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1.
Rev. bras. ciênc. vet ; 26(4): 137-141, out./dez. 2019. il.
Article in Portuguese | LILACS (Americas), VETINDEX | ID: biblio-1380033

ABSTRACT

O objetivo do presente estudo foiavaliar os efeitos do probiótico Saccharomyces boulardii na modulação da resposta imune humoral de animais expostos a antígenos de Leishmania infantum. Para isso, 16 camundongos BALB/c foram imunizados com antígeno particulado de Leishmania infantum e divididos em dois grupos experimentais, um composto por animais suplementados e outro por animais não suplementados com o probiótico. Amostras de sangue dos animais foram colhidas semanalmente durante o período experimental e submetidas ao Ensaio da Imunoabsorbância Ligado à Enzima indireto para avaliação dos títulos de IgG totais e o perfil dos isotipos de IgG produzidos (IgG1 e IgG2a). A suplementação com o probiótico não exacerbou a produção de IgG total em comparação ao grupo controle, não havendo diferenças significativas entre os dois grupos. Porém, as soroconversões de IgG2a foram mais elevadas no grupo suplementado, no qual registrou-se um aumento de 1,46 vezes no final do experimento. Assim,a suplementação com S. boulardii foi capaz de modular a resposta de IgG2a/IgG1 nos animais expostos aos antígenos de Leishmania infantum.


The aim of the present study was to evaluate the effects of the Saccharomyces boulardii probiotic on the modulation of humoral immune response in animals exposed to Leishmania infantum antigens. For this, 16 BALB/c mice were immunized with Leishmania infantum particulate antigen and divided into two experimental groups, one consisting of supplemented animals and the other not probiotic supplemented animals. Blood samples from the animals were taken weekly during the experimental period and subjected to the Indirect Enzyme-Linked Immunosorbance Assay for evaluation of total IgG titers and the profile of the produced IgG isotypes (IgG1 and IgG2a). Probiotic supplementation did not exacerbate total IgG production compared to the control group, with no significant differences between the two groups. However, IgG2a seroconversions were higher in the supplemented group, which showed a 1.46-fold increase at the end of the experiment. Thus, supplementation with S. boulardii was able to modulate the IgG2a/IgG1 response in animals exposed to Leishmania infantum antigens.


Subject(s)
Animals , Mice , Immunoglobulin G/immunology , Leishmania infantum , Saccharomyces boulardii/immunology , Immunity/drug effects , Leishmaniasis, Visceral/drug therapy , Mice, Inbred BALB C/immunology
2.
Acta sci. vet. (Impr.) ; 41: Pub. 1158, 2013. ilus, mapa
Article in English | VETINDEX | ID: biblio-1371105

ABSTRACT

Background: Hemoplasmas are eperythrocytic procaryotes, including Mycoplasma species which were recently transferred from the genera Eperythrozoon and Haemobartonella, based on their similarity of the 16S rRNA sequences, and newly identified hemotropic mycoplasmas. Eperythrozoonosis of pigs is caused by the haemotrophic bacterium M. suis, and the disease has a worldwide distribution. The disease manifests as a severe and often fatal acute febrile icteroanemia, mainly in piglets, pregnant sows before parturition and fattening pigs exposed to stress. The aim of this study was to determine the seroprevalence of IgG to M. suis in swine populations in Serbia, using a Western Blot test with the recombinant protein MSG1. Materials, Methods & Results: Four farms were chosen to represent the main swine-producing geographic regions of Serbia, including South Backa District (farms 1 and 2), North Backa District (farm 3) and Branicevo District (farm 4). A total of forty-six clinically healthy pigs, age 8-20 weeks, were included in the study. Blood samples from pigs randomly selected from the four farms were collected by jugular vein puncture into serum vacutainer tubes with clot activator. After clotting at room temperature for 1 h, blood samples were centrifuged at 1500 g, for 15 min at room temperature. Sera were carefully harvested and stored at -20°C until assayed. The sera samples were tested by the Western Blot test with recombinant protein MSG1 (p40). Production of recombinant protein MSG1 (p40), dodecyl sulfate-polyacrylamide gel electrophoresis and immunoblotting were performed as previously described by Hoelzle. Specific IgG antibodies to MSG1 of M. suis were identified in 20 of the 46 samples tested, giving a total seroprevalence of 43.47%. The M. suis-specific antibody response was detected in pigs from all tested farms, within farm seroprevalences of 54.54% on farm 1; 27.27% on farm 2; 36.36% on farm 3 and 53.84% on farm 4. Discussion: Reports on the prevalence of swine infected with Mycoplasma suis in other countries are rare, but have been communicated for USA, Brazil, Japan, Portugal, China and Germany. Previously published values of the prevalence of the pigs infected with haemoplasmas in Serbia, determined through a microscopic examination of the peripheral blood smear according to Giemsa was 39% and with Acridine orange was 47%. These prevalences are similar to the overall prevalence found in this study (43.47%). In this present study, the prevalence of M. suis in the farm pigs studied in Serbia (43.47%) was higher than the serological evidence of the infection reported in pigs in the USA, Brazil and Japan, but lower than the prevalence in sows in Portugal and China. In this present study, the prevalence of M. suis on the studied pig farms in Serbia (43.47%) was more similar to results obtained in Germany, where M. suis infections were detected in 79 out of 196 pig farms (40.3%) by employing a quantitative real-time LightCycler PCR. Also, M. suis was detected in 36 out of 359 wild German boars (10.03%) with similar methodology. Our seroprevalence of anti-M. suis IgG in farmed pigs is probably higher than that in wild boar because of the conditions of intensive breeding on pig farms, but perhaps this may also be partly due to the different geographic locality, and/or to different analytical methods. This overall determined seroprevalence of 43.47% from a small sample within a relatively small area suggests a signifi cantly higher presence of infection on pig farms in Serbia, and hence, significantly more economic losses in pig production than could be expected based on the worldwide reports of M. suis prevalence.


Subject(s)
Animals , Swine Diseases/blood , Immunoglobulin G , Blotting, Western/veterinary , Prevalence , Pneumonia of Swine, Mycoplasmal/epidemiology , Mycoplasma Infections/veterinary
3.
Ciênc. rural (Online) ; 52(8): e20210182, 2022. tab, graf
Article in English | VETINDEX | ID: biblio-1360342

ABSTRACT

The aims of this study were: 1) determine total specific IgG and subisotypes in serum and colostrum of pregnant mares vaccinated against Theileria equi and Streptococcus equi subspecies equi; 2) determine total specific IgG and subisotypes in foals born from these mares. In mares, the highest total serum IgG value for T. equi was at 335 days of gestation declining 30 days postpartum, while for S. equi was at 328 days of gestation remaining high up to 30 days postpartum. Transfer of passive immunity against both antigens was observed with specific IgG values in colostrum and foals' serum proportional to mares' values. The most detected specific IgG subisotypes were IgG3/5 and IgG4/7 for both antigens. Foals born from mares immunized with T. equi kept maternal IgG values until 2 months of age, while those born from mares immunized with S. equi kept maternal IgG values until 3-4 months of age. These results suggest that foals should be vaccinated after this period.


Os objetivos deste estudo foram: 1) determinar IgG total específica e seus subisotipos no soro e colostro de éguas vacinadas contra Theileria equi e Streptococcus equi subspécie equi; 2) determinar IgG total específica e seus subisotipos em potros provenientes dessas éguas. Em éguas vacinadas contra T. equi, o maior nível sérico de IgG total específico ocorreu aos 335 dias de gestação, decaindo 30 dias pós parto, enquanto nas vacinadas contra S. equi, ocorreu aos 328 dias de gestação e manteve-se pelo mesmo período. A avaliação de IgG total específica no colostro de éguas vacinadas demonstrou níveis de IgG proporcionais aos títulos do soro materno. Os isotipos de IgG mais detectados foram IgG3/5 e IgG4/7 para ambos antígenos avaliados. Potros provenientes de éguas vacinadas com antígeno de T. equi mantiveram os níveis de IgG específica até dois meses de idade, enquanto potros provenientes de éguas vacinadas com antígeno de S. equi mantiveram por três a quatro meses, sugerindo que esse seja o período ideal para início do esquema vacinal em potros.


Subject(s)
Animals , Immunoglobulin G/blood , Vaccines , Immunization, Passive/veterinary , Streptococcus equi , Horse Diseases/blood , Horses
4.
Acta Sci. Anim. Sci. ; 43: e49844, ago. 2021. tab
Article in English | VETINDEX | ID: vti-32076

ABSTRACT

To investigate the effect of feeding heat-treated colostrum at different duration on the health and performance, 48 Holstein calves were enrolled randomly into four treatment groups before first feeding and consumed untreated colostrum (H0, n = 12), heat-treated colostrum at 60ºC for 30 min. (H30, n = 12), heat-treated colostrum at 60ºC for 60 min. (H60, n = 12) and heat-treated colostrum at 60ºC for 90 min. (H90, n = 12). Blood samples were collected for analyses of IgG and protein profile at 0, 6, and 24h of age. The colostrum sample from treated and untreated batches and feces sample from each calf also were taken. The results showed heat-treatment of colostrum at 60ºC for 60 (p = 0.03) and 90 min. (p = 0.01) reduced total bacterial count, while colostral IgG concentration maintained up to 60 min. Serum total protein (p = 0.02), IgG concentrations (p = 0.03), and apparent efficiency of IgG absorption (p = 0.02) were significantly greater at 6 and 24h in calves that were fed heat-treated colostrum (H90) compared to calves fed unheated colostrum (H0). General health status of calves that were received heat-treated colostrum was better and the prevalence of diarrhea-induced pathogens was lower than calves were fed unheated colostrum. In conclusion, the consumption of heat-treated colostrum had a positive effect on health, growth characteristics, and performance of calves during the suckling period.(AU)


Subject(s)
Animals , Female , Cattle , Cattle , Colostrum , Thermic Treatment/analysis , Immunoglobulin G
5.
Arq. bras. med. vet. zootec. (Online) ; 73(5): 1047-1057, Sept.-Oct. 2021. tab, ilus
Article in English | LILACS (Americas), VETINDEX | ID: biblio-1345276

ABSTRACT

Colostrum is the main source of immunoglobulins (Ig) for neonate piglets and plays a crucial role within the health and growth of the piglet. Currently in pig farming, there are still no widespread practical methods for measuring the Ig concentration in colostrum at herd level. We evaluated sows' colostrum IgG concentration using an optical and a digital Brix refractometer and their performance was correlated to an IgG ELISA test, and flow cytometry. Colostrum concentrations of IgG and IgA averaged 74.05 ± 21.37mg/mL and 20.2 ± 5.32mg/mL respectively. The mean value of the Brix percentages for optical refractometer was 26.32%, and for digital was 28.32%. The Brix refractometer measurements of colostrum samples presented high correlation for IgG content analyzed by ELISA (Optical = 0.74, Digital = 0.87; P <0.001). Considering the immunophenotyping, the values for IgG and IgA lymphoblasts indicated a highly significant relationship to ELISA (IgG=0.77, IgA=0.84; P<0.001). The Brix refractometer can be considered a useful tool to be included in a colostrum monitoring program to improve potentially neonatal health. In addition, we demonstrated that flow cytometry can be an important tool to analyze and characterize the immunological potential of sow colostrum.(AU)


O colostro é a principal fonte de imunoglobulinas (Ig) para leitões recém-nascidos e desempenha um papel crucial na saúde e no crescimento dos leitões. Atualmente, na suinocultura, ainda não existem métodos amplamente utilizados na prática de produção para medir a concentração de imunoglobulinas no colostro suíno. Avaliou-se a concentração de IgG no colostro de porcas usando refratômetros Brix óptico e digital, e o desempenho foi comparado com ELISA e citometria de fluxo. As concentrações de IgG e IgA no colostro foram 74,05 ± 21,37mg/mL e 20,2 ± 5,32mg/mL, respectivamente. A percentagem de Brix média das amostras de colostro para o refratômetro óptico foi 26,32%, e para o digital foi 28,32%. As medições dos refratômetros de Brix apresentaram elevada correlação com a concentrações de IgG medidas por ELISA (óptico=0,74, digital=0,87; P<0,001). Considerando a imunofenotipagem, os valores dos linfoblastos IgG e IgA apresentaram alta correlação com o ELISA (IgG=0,77, IgA=0,84; P<0,001). O refratômetro Brix pode ser considerado uma ferramenta útil para ser incluída em um programa de monitoramento de colostro para melhorar a saúde neonatal. Além disso, foi demonstrado que a citometria de fluxo pode ser uma ferramenta importante para analisar e caracterizar o potencial imunológico do colostro de porcas.(AU)


Subject(s)
Animals , Female , Pregnancy , Immunoglobulin G , Colostrum , Sus scrofa/immunology , Immunoglobulin A , Flow Cytometry/veterinary
6.
Pesqui. vet. bras ; 41: e06814, 2021. graf, ilus
Article in English | VETINDEX | ID: vti-32458

ABSTRACT

The protozoan Neospora caninum is known worldwide as one of the main causes of abortion in cattle. During infection, rhoptry proteins present in the apical complex of the parasite play important roles in adhesion and parasitophorous vacuole formation. The use of N. caninum ROP2 in experimental vaccines has shown promising protective results. In our study we performed cloning and expression in Escherichia coli of an antigenic portion of N. caninum ROP2. The recombinant protein (rROP2) was obtained in insoluble form, and the purified protein showed a size of approximately 18kDa. Even being a small truncate NcROP2 region, it was possible to conserve the antigenic epitopes which were recognized by bovine serum naturally infected with N. caninum. Vaccination with rROP2 on aluminum hydroxide adjuvant induced high levels of rROP2-specific IgG antibodies capable of recognizing native protein in tachyzoite lysates. In conclusion, our approaches were effective in obtaining the rROP2 protein, which induced specific mouse immune response and was also recognized by sera from N. caninum naturally infected cattle. These results suggest that it is a promising antigen for the development of neosporosis subunit vaccines as well as a suitable antigen for use in immunodiagnosis.(AU)


O protozoário Neospora caninum é conhecido mundialmente como uma das principais causas de aborto em bovinos. Durante a infecção, as proteínas rhoptry presentes no complexo apical do parasita desempenham papel importante na adesão e formação de vacúolos parasitóforos. O uso de ROP2 de N. caninum em vacinas experimentais tem mostrado resultados de proteção promissores. Em nosso estudo, realizamos a clonagem e expressão em Escherichia coli de uma porção antigênica de N. caninum ROP2. A proteína recombinante (rROP2) foi obtida na forma insolúvel, e a proteína purificada apresentou tamanho aproximado de 18kDa. Mesmo sendo uma pequena região truncada de NcROP2, foi possível conservar os epítopos antigênicos que foram reconhecidos pelo soro de bovinos naturalmente infectados com N. caninum. A vacinação com rROP2 adsorvida no adjuvante de hidróxido de alumínio induziu altos níveis de anticorpos IgG anti-rROP2, capazes de reconhecer a proteína nativa em lisados de taquizoítos. Em conclusão, nossas abordagens foram eficazes na obtenção da proteína rROP2, que induziu resposta imune específica em camundongos e também foi reconhecida por soros de bovinos naturalmente infectados com N. caninum. Estes resultados sugerem que rROP2 é um antígeno promissor para o desenvolvimento de vacinas de subunidades de neosporose, bem como um antígeno adequado para uso em imunodiagnóstico.(AU)


Subject(s)
Immunologic Tests , Immunoglobulin G , Vaccines , Neospora , Cloning, Organism
7.
Pesqui. vet. bras ; 41: e06814, 2021. graf, ilus
Article in English | LILACS (Americas), VETINDEX | ID: biblio-1279534

ABSTRACT

The protozoan Neospora caninum is known worldwide as one of the main causes of abortion in cattle. During infection, rhoptry proteins present in the apical complex of the parasite play important roles in adhesion and parasitophorous vacuole formation. The use of N. caninum ROP2 in experimental vaccines has shown promising protective results. In our study we performed cloning and expression in Escherichia coli of an antigenic portion of N. caninum ROP2. The recombinant protein (rROP2) was obtained in insoluble form, and the purified protein showed a size of approximately 18kDa. Even being a small truncate NcROP2 region, it was possible to conserve the antigenic epitopes which were recognized by bovine serum naturally infected with N. caninum. Vaccination with rROP2 on aluminum hydroxide adjuvant induced high levels of rROP2-specific IgG antibodies capable of recognizing native protein in tachyzoite lysates. In conclusion, our approaches were effective in obtaining the rROP2 protein, which induced specific mouse immune response and was also recognized by sera from N. caninum naturally infected cattle. These results suggest that it is a promising antigen for the development of neosporosis subunit vaccines as well as a suitable antigen for use in immunodiagnosis.(AU)


O protozoário Neospora caninum é conhecido mundialmente como uma das principais causas de aborto em bovinos. Durante a infecção, as proteínas rhoptry presentes no complexo apical do parasita desempenham papel importante na adesão e formação de vacúolos parasitóforos. O uso de ROP2 de N. caninum em vacinas experimentais tem mostrado resultados de proteção promissores. Em nosso estudo, realizamos a clonagem e expressão em Escherichia coli de uma porção antigênica de N. caninum ROP2. A proteína recombinante (rROP2) foi obtida na forma insolúvel, e a proteína purificada apresentou tamanho aproximado de 18kDa. Mesmo sendo uma pequena região truncada de NcROP2, foi possível conservar os epítopos antigênicos que foram reconhecidos pelo soro de bovinos naturalmente infectados com N. caninum. A vacinação com rROP2 adsorvida no adjuvante de hidróxido de alumínio induziu altos níveis de anticorpos IgG anti-rROP2, capazes de reconhecer a proteína nativa em lisados de taquizoítos. Em conclusão, nossas abordagens foram eficazes na obtenção da proteína rROP2, que induziu resposta imune específica em camundongos e também foi reconhecida por soros de bovinos naturalmente infectados com N. caninum. Estes resultados sugerem que rROP2 é um antígeno promissor para o desenvolvimento de vacinas de subunidades de neosporose, bem como um antígeno adequado para uso em imunodiagnóstico.(AU)


Subject(s)
Immunologic Tests , Immunoglobulin G , Vaccines , Neospora , Cloning, Organism
8.
Pesqui. vet. bras ; 40(12): 1073-1076, dez. 2020. tab
Article in English | VETINDEX | ID: vti-31891

ABSTRACT

Bronchoalveolar lavage fluid (BALF) was analyzed to obtain information on leakage of acute-phase proteins from the blood into the respiratory lumen and about local synthesis. Ceruloplasmin, transferrin, albumin, α1-antitripsin, immunoglobulin G heavy, immunoglobulin G light, immunoglobulin A, haptoglobin, acidic glycoprotein, and P23 were measured in BALF from 30 horses without inflammatory disease by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). In serum, the same proteins were identified except for α1-antitrypsin. In conclusion, this study demonstrated that polyacrylamide gel electrophoresis (SDS-PAGE) can be used for the determination of acute-phase proteins in BALF samples from horses. In healthy horses, the values are very low, but they can be compared with reference values to assist in the diagnosis of animals with respiratory diseases.(AU)


O líquido obtido através da lavagem broncoalveolar (LBA) foi analisado para obter informações sobre as proteínas da fase aguda. Ceruloplasmina, transferrina, albumina, α1-antitripsina, imunoglobulina G pesada, imunoglobulina G leve, imunoglobulina A, haptoglobina, glicoproteína ácida e P23 foram medidas nos LBA de 30 cavalos sem doença inflamatória por eletroforese em gel de poliacrilamida com dodecilsulfato de sódio (SDS-PAGE). No soro, as mesmas proteínas foram identificadas, exceto a α1-antitripsina. Em conclusão, este estudo demonstra que a eletroforese em gel de poliacrilamida (SDS-PAGE) pode ser usada para a determinação de proteínas de fase aguda em amostras de LBA em cavalos. Em cavalos saudáveis, os valores são muito baixos, no entanto, podem ser comparados e auxiliar no diagnóstico de animais com doenças respiratórias.(AU)


Subject(s)
Animals , Biomarkers/analysis , Acute-Phase Reaction/diagnosis , Bronchoalveolar Lavage/veterinary , Electrophoresis, Polyacrylamide Gel , Horses , Ceruloplasmin , Haptoglobins , Immunoglobulin A , Immunoglobulin G , Glycoproteins
9.
Pesqui. vet. bras ; 40(12): 1073-1076, Dec. 2020. tab
Article in English | LILACS (Americas), VETINDEX | ID: biblio-1155038

ABSTRACT

Bronchoalveolar lavage fluid (BALF) was analyzed to obtain information on leakage of acute-phase proteins from the blood into the respiratory lumen and about local synthesis. Ceruloplasmin, transferrin, albumin, α1-antitripsin, immunoglobulin G heavy, immunoglobulin G light, immunoglobulin A, haptoglobin, acidic glycoprotein, and P23 were measured in BALF from 30 horses without inflammatory disease by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). In serum, the same proteins were identified except for α1-antitrypsin. In conclusion, this study demonstrated that polyacrylamide gel electrophoresis (SDS-PAGE) can be used for the determination of acute-phase proteins in BALF samples from horses. In healthy horses, the values are very low, but they can be compared with reference values to assist in the diagnosis of animals with respiratory diseases.(AU)


O líquido obtido através da lavagem broncoalveolar (LBA) foi analisado para obter informações sobre as proteínas da fase aguda. Ceruloplasmina, transferrina, albumina, α1-antitripsina, imunoglobulina G pesada, imunoglobulina G leve, imunoglobulina A, haptoglobina, glicoproteína ácida e P23 foram medidas nos LBA de 30 cavalos sem doença inflamatória por eletroforese em gel de poliacrilamida com dodecilsulfato de sódio (SDS-PAGE). No soro, as mesmas proteínas foram identificadas, exceto a α1-antitripsina. Em conclusão, este estudo demonstra que a eletroforese em gel de poliacrilamida (SDS-PAGE) pode ser usada para a determinação de proteínas de fase aguda em amostras de LBA em cavalos. Em cavalos saudáveis, os valores são muito baixos, no entanto, podem ser comparados e auxiliar no diagnóstico de animais com doenças respiratórias.(AU)


Subject(s)
Animals , Biomarkers/analysis , Acute-Phase Reaction/diagnosis , Bronchoalveolar Lavage/veterinary , Electrophoresis, Polyacrylamide Gel , Horses , Ceruloplasmin , Haptoglobins , Immunoglobulin A , Immunoglobulin G , Glycoproteins
10.
Acta sci., Anim. sci ; 42: e48425, out. 2020. tab, graf
Article in English | VETINDEX | ID: vti-26721

ABSTRACT

The objective of this study was to assess the effects of auto-lysed yeast and yeast extract on performance and immune responses of cows in hot climate in the early lactation period. Twenty five lactating dairy cows randomly assigned to 5 groups and 5 replicates. Cows received basal diet with or without auto-lysed yeast (20 or 40 g/d/head) or yeast extract (20 or 40 g/d/head) as on top-dressed. There were no differences for daily dry matter intake, milk production milk fat and the counts of red blood cells and white blood cells among treatments (p > 0.05). There were significant differences among treatments for immunoglobulin G (IgG) level, lymphocyte and neutrophil percentages. Yeast extract had no effect on IgG level, but auto-lysed yeast increased IgG level and neutrophil percentage and decreased lymphocyte percentage (p < 0.05). The highest relative interleukin-2 gene expression was for cows received auto-lysed yeast at the level of 40 g/d/head. Yeast extract had no significant effect on interleukin-2 gene expression as compared to the control group. It was concluded that auto-lysed yeast at the level of 40 g/d/head had no effect on performance, but it could positively influence on immune response of lactating dairy cows in hot climate during early period of lactation.(AU)~ien


Subject(s)
Animals , Female , Cattle , Cattle/blood , Cattle/genetics , Cattle/physiology , Yeasts , Immunoglobulin G , Heat-Shock Response
11.
Acta sci., Anim. sci ; 41: e45533, jul. 2019. tab, graf
Article in English | VETINDEX | ID: vti-21617

ABSTRACT

First colostrum is an important source of nutrients and immune factors which are necessary for calves in the first weeks of life. Despite these benefits, colostrum can also represent one of the earliest potential exposures of dairy calves to infectious agents which these patogens can act directly on growth and cause diseases such as scours or septicemia. With recent increased interest in pasteurized milk feeding systems, producers have been curious to learn if there may also be benefits from feeding pasteurized colostrum. This study was realized to determine the effects of feeding heat-treated colostrum or unheated colostrum on passive transfer of immunity, immunoglobulin G (IgG) concentration, total plate count, health and performance of neonatal dairy calves. First-milking colostrum was collected from Holstein cows and frozen at -20°C to accumulate a large batch. Pooled batches of colostrum were mixed and divided equally: One half was fed unheated colostrum; whereas the other half was fed after heat treatment at 60°C for 30 min. Forty newborn male Holstein dairy calves were fed either unheated (n = 20) and heat-treated colostrum (n = 20), 10% of their birth weight. Calves received 4 L within 1 to 2h after birth and residuals was fed 6h after birth. Serum samples collected from calves and were assayed for serum total protein (STP) and IgG. Feed intake recorded weekly and body weight and skeletal growth measures recorded at d 3 and d 63 (weaning). Every day, calves clinically diagnosed either as being healthy or suffering from respiratory disease and neonatal calf diarrhea. Heat-treated colostrum resulted in lower colostrum bacterial concentration (2.01 vs. 3.96 cfu mL-1 ). Calves fed heat treated colostrum had greater STP in 24, 72h and 23d, IgG concentrations at 24 and 72h plus unheated colostrum. Also weaning weight and average daily gain were greater in calves feed heated colostrum. There were no differences in starter intake and feed efficiency between two groups. Calves fed heat-treated colostrum had lower fecal scores, diarrhea and pneumonia incidence. There were not differences in skeletal growth measurements except body barrel. These results shows that feeding heated colostrum can provide better growth and health in neonatal calves.(AU)


Subject(s)
Animals , Infant , Cattle , Colostrum/chemistry , Colostrum/enzymology , Immunoglobulin G/analysis , Weaning
12.
Acta sci. vet. (Online) ; 47: Pub. 1681, Sept. 25, 2019. tab, graf
Article in English | VETINDEX | ID: vti-23846

ABSTRACT

Background: Passive immunity acquired by colostrum ingestion is essential to prevent neonatal infections. Failure ofpassive transfer (FPT) of maternal immunity occurs in foals that fail to absorb enough immunoglobulins within 24 h afterbirth. Foals with FPT are at increased risk of infections and death. Serum samples from neonatal foals might be examinedfor FPT using the zinc sulphate turbidity (ZST) test. The aim of this study was to investigate the accuracy of the ZST test,performed at two different times after first suckling (12 and 18 h), to detect FPT in newborn foals. The effect of temperatureon the turbidity intensity resulting from the ZST reaction was also investigated.Materials, Methods & Results: Blood samples were collected from 112 newborn foals at 12 h after the first colostrumintake. In 36 foals, additional serum samples were collected at 18 h after first colostrum intake. The serum samples weretested with the ZST test and, later, in the laboratory setting, the ZST test was repeated. The IgG levels were measured bysingle radial immunodiffusion (SRID), which was used as the reference method. The standard solution used for the interpretation of results had a turbidity corresponding to approximately 800 mg/dL of immunoglobulins (IgG). The mean IgG concentration measured at 12 and 18 h after the first colostrum intake was analyzed using the t-test for paired samples.Values of absorbance of ZST test under different temperatures were analyzed using a one-way analysis of variance, andmeans were compared using the Tukey test. The relationship between the temperature of the solution and absorbance wasdetermined using the Pearsons correlation coefficient. Based on SRID results, 12 foals (10.7%) had serum IgG concentration < 400 mg and 26 foals (23.2%) had IgG levels between 400 and 800 mg/dL. Serum levels of IgG determined bySRID in 36 foals were similar (P > 0.05) between 12 h (943.9 ± 508.6 mg/dL) and 18 h (975.9 ± 525.6 mg/dL)...(AU)


Subject(s)
Animals , Horses/immunology , Zinc Sulfate , Animals, Newborn/immunology , Immunity, Maternally-Acquired , Immunoglobulin G , Immunologic Tests/veterinary , Colostrum
13.
Pesqui. vet. bras ; 38(5): 795-805, May 2018. tab, graf
Article in Portuguese | VETINDEX | ID: vti-20692

ABSTRACT

Este trabalho teve por objetivo avaliar o proteinograma e concentrações séricas de IgG (após a padronização de teste ELISA) em potros do nascimento aos trinta dias de idade, antes e depois de mamarem colostro e serem tratados com plasma por via intravenosa. Foram utilizados 20 potros e suas respectivas mães, além de quatro animais doadores de plasma. Foram colhidas amostras de sangue dos potros em cinco momentos, logo após o nascimento e antes de mamar colostro (M1), dez horas após nascimento (M2), 24 horas após nascimento e previamente administração do plasma sanguíneo (M3), 48 horas de vida e 24 horas após administração do plasma sanguíneo (M4), e 30 dias após nascimento (M5). Foram colhidos sangue e colostro das éguas progenitoras no momento do parto. A concentração de proteína total (PT) e albumina foram determinadas em analisador bioquímico, a concentração de PT também foi avaliada em refratômetro manual. O fracionamento proteico foi realizado utilizando eletroforese em gel de agarose. A densidade do colostro foi avaliada com colostrômetros de refração BRIX e de densidade específica. A concentração de IgG total de todas as amostras foi determinada por teste ELISA. Com o sistema de ELISA aqui proposto foi possível determinar concentrações de IgG em amostras de soro, plasma e colostro equino com adequada repetibilidade. A média ± desvio padrão da concentração sérica de IgG dos potros ao nascer, foi de 15±8mg/dL, com dez horas de vida foi de 2.408±608mg/dL, se manteve em níveis semelhantes até 48 horas (2.364±784mg/dL) e diminuíram significativamente aos 30 dias de vida (1.414±586mg/dL). A concentração sérica e colostral de IgG nas éguas foi de 1.746±505mg/dL e 7.714±2.619mg/dL, respectivamente. A concentração plasmática de IgG dos doadores de plasma foi de 2.026±148mg/dL. Houve correlação positiva entre as concentrações séricas de IgG e PT (r=0,69 para refratômetro e r=0,76...(AU)


The aim of this study was to evaluate serum protein and serum IgG concentrations (after a direct enzyme immunoassay test ELISA optimization) in newborns foals from birth to thirty days of life before and after colostrum consumption and intravenous treatment with plasma. Twenty foals and their respective progenitors as well as four plasma donor's horses were used. Blood samples were obtained from newborn foals at five time points, immediately after birth and before colostrum intake (M1), ten hours after birth (M2), 24 hours after birth and prior administration of blood plasma (M3), 48 hours after birth and 24 hours after plasma administration (M4), and 30 days after birth (M5). Blood and colostrum samples were collected from the progenitor mares immediately postpartum. Concentration of total protein (TP) and albumin were determined using a biochemical analyzer. The TP concentration was also measured by refractometer. Fractions of total serum protein were separated using agarose gel electrophoresis. Colostrum density was evaluated using BRIX refractometer and specific density colostrometer. Total IgG concentration was determined by an enzyme-linked immunosorbent assay. With the ELISA system proposed here it was possible to determine IgG concentrations in serum, plasma, and equine colostrum samples with adequate repeatability. Serum IgG concentration in foals at birth was 15±8mg/dL (mean ± standard deviation) raising at ten hours (2,408±608mg/dL) and remaining at similar levels up to 48 hours of life (2,364±784mg/dL), and decreasing significantly at 30 days of age (1,414±586mg/dL). Serum and colostrum IgG concentrations of mares were 1,746±505mg/dL and 7,714±2,619mg/dL, respectively. The plasma IgG concentrations from donor mares were 2,026±148mg/dL. Total protein...(AU)


Subject(s)
Animals , Infant, Newborn , Plasma/chemistry , Immunoglobulin G/analysis , Horses/blood , Electrophoresis
14.
Pesqui. vet. bras ; 38(5): 795-805, May 2018. tab, graf
Article in Portuguese | LILACS (Americas), VETINDEX | ID: biblio-955403

ABSTRACT

Este trabalho teve por objetivo avaliar o proteinograma e concentrações séricas de IgG (após a padronização de teste ELISA) em potros do nascimento aos trinta dias de idade, antes e depois de mamarem colostro e serem tratados com plasma por via intravenosa. Foram utilizados 20 potros e suas respectivas mães, além de quatro animais doadores de plasma. Foram colhidas amostras de sangue dos potros em cinco momentos, logo após o nascimento e antes de mamar colostro (M1), dez horas após nascimento (M2), 24 horas após nascimento e previamente administração do plasma sanguíneo (M3), 48 horas de vida e 24 horas após administração do plasma sanguíneo (M4), e 30 dias após nascimento (M5). Foram colhidos sangue e colostro das éguas progenitoras no momento do parto. A concentração de proteína total (PT) e albumina foram determinadas em analisador bioquímico, a concentração de PT também foi avaliada em refratômetro manual. O fracionamento proteico foi realizado utilizando eletroforese em gel de agarose. A densidade do colostro foi avaliada com colostrômetros de refração BRIX e de densidade específica. A concentração de IgG total de todas as amostras foi determinada por teste ELISA. Com o sistema de ELISA aqui proposto foi possível determinar concentrações de IgG em amostras de soro, plasma e colostro equino com adequada repetibilidade. A média ± desvio padrão da concentração sérica de IgG dos potros ao nascer, foi de 15±8mg/dL, com dez horas de vida foi de 2.408±608mg/dL, se manteve em níveis semelhantes até 48 horas (2.364±784mg/dL) e diminuíram significativamente aos 30 dias de vida (1.414±586mg/dL). A concentração sérica e colostral de IgG nas éguas foi de 1.746±505mg/dL e 7.714±2.619mg/dL, respectivamente. A concentração plasmática de IgG dos doadores de plasma foi de 2.026±148mg/dL. Houve correlação positiva entre as concentrações séricas de IgG e PT (r=0,69 para refratômetro e r=0,76 para bioquímico), GT (r=0,81) e gamaglobulina (r=0,85). Dez horas após o nascimento foi possível verificar a transferência de imunidade passiva, possibilitando adotar medidas profiláticas e/ou terapêuticas em haras de criação de cavalos. Considerando que a proteína total, globulinas totais e fração γ-globulina apresentam correlação com IgG, estas determinações são úteis para monitorar os potros após mamarem o colostro. Um litro de plasma administrado às 24 horas de vida não foi suficiente para aumentar as concentrações séricas de IgG, 24 horas após transfusão, em potros com adequada transferência de imunidade passiva.(AU)


The aim of this study was to evaluate serum protein and serum IgG concentrations (after a direct enzyme immunoassay test ELISA optimization) in newborns foals from birth to thirty days of life before and after colostrum consumption and intravenous treatment with plasma. Twenty foals and their respective progenitors as well as four plasma donor's horses were used. Blood samples were obtained from newborn foals at five time points, immediately after birth and before colostrum intake (M1), ten hours after birth (M2), 24 hours after birth and prior administration of blood plasma (M3), 48 hours after birth and 24 hours after plasma administration (M4), and 30 days after birth (M5). Blood and colostrum samples were collected from the progenitor mares immediately postpartum. Concentration of total protein (TP) and albumin were determined using a biochemical analyzer. The TP concentration was also measured by refractometer. Fractions of total serum protein were separated using agarose gel electrophoresis. Colostrum density was evaluated using BRIX refractometer and specific density colostrometer. Total IgG concentration was determined by an enzyme-linked immunosorbent assay. With the ELISA system proposed here it was possible to determine IgG concentrations in serum, plasma, and equine colostrum samples with adequate repeatability. Serum IgG concentration in foals at birth was 15±8mg/dL (mean ± standard deviation) raising at ten hours (2,408±608mg/dL) and remaining at similar levels up to 48 hours of life (2,364±784mg/dL), and decreasing significantly at 30 days of age (1,414±586mg/dL). Serum and colostrum IgG concentrations of mares were 1,746±505mg/dL and 7,714±2,619mg/dL, respectively. The plasma IgG concentrations from donor mares were 2,026±148mg/dL. Total protein, total globulins, and γ-globulin fraction showed correlation with IgG. Ten hours post birth was an adequate time to verify the transfer of passive immunity, allowing to adoption prophylactic and/or therapeutic measures in a horse farms. One liter of plasma administered at 24 hours of life was not sufficient to raise serum IgG concentrations in foals without passive immunity transfer failure.(AU)


Subject(s)
Animals , Infant, Newborn , Plasma/chemistry , Immunoglobulin G/analysis , Horses/blood , Electrophoresis/statistics & numerical data
15.
R. bras. Med. equina ; 13(76): 4-8, mar.-abr. 2018. ilus
Article in Portuguese | VETINDEX | ID: vti-18837

ABSTRACT

O Brasil é um grande produtor de equinos, tanto para o mercado interno como para o externo. O manejo adequado dos animais, principalmente potros, é de fundamental importância para manutenção, ou até mesmo crescimento do rebanho de equídeos, visto que estes serão futuros reprodutores. Neste sentido, o consumo de colostro é fator fundamental do manejo, já que sua ingestão está associada ao sistema imunológico do neonato e, por conseguinte, à sobrevivência dos potros. Esta revisão bibliográfica aborda os diversos métodos de avaliação do colostro, bem como alternativas para casos de falha na transferência passiva de imunidade. Além disso, abrange a composição do colostro relacionando-a com sua qualidade.(AU)


Brazil is one of the major equine breeders in the world, not only supplying for the internal market, but also exporting horses. Proper management of animals, especially foals, is extremely important for the maintenance or even growth of the equine herd, since they are future breeding animais. Colostrum consumption is a key factor for horse management since its ingestion is associated to newborns immune system and survival. This review addresses several methods of colostrum evaluation, alternatives for immunity failure immunoglobulins cases, and also colostrum composition regarding to its quality.(AU)


Brasil es uno de los principales criadores equinos del mundo, no sólo abasteciendo el mercado interno, sino también exportando caballos. El manejo adecuado de los animales, especialmente de los potros, es extremadamente importante para el mantenimiento o incluso el crecimiento de la manada equina, ya que estos serán futuros animales reproductores. El consumo de calostro es un factor clave para el recien nacidos, ya que su ingesta está asociada al sistema inmunológico y la supervivencia de ellos. Esta revisión aborda varios métodos de evaluación del calostro, alternativas en casos de falla en la inmunidad passiva provista por la yegua y también la composición del calostro con respecto a su calidad.(AU)


Subject(s)
Animals , Female , Pregnancy , Infant, Newborn , Horses , Colostrum/immunology , Colostrum , Immunoglobulin G/analysis , Animals, Newborn , Immunization, Passive/veterinary
16.
Arq. bras. med. vet. zootec. (Online) ; 70(1): 1-5, Jan.-Feb. 2018. tab
Article in English | LILACS (Americas), VETINDEX | ID: biblio-888102

ABSTRACT

Both the presence of owned dogs and stray dogs allows the spread of Toxocara, a parasite whose eggs can be found in soil, water and food. Animals, including horses, serve as definitive and paratenic hosts. In México, where consumption of horse meat is common, Toxocara is a zoonotic parasite. The aim of this study was to identify the presence of anti-Toxocara antibodies in work horses and horses intended for human consumption by ELISA. ELISA was chosen for analysis as paratenic hosts do not shed Toxocara eggs in their feces. Blood samples were collected from a total of 188 horses, 94 of which were work horses and 94 horses from the slaughter house. Samples were analyzed by ELISA, and the general equine seroprevalence was found to be 44.6% (n = 188). Adult horses for slaughter had a 61.7% greater presence of anti-Toxocara antibodies (p = 0.006). Toxocara IgG antibodies were found in horses, confirming that horses are paratenic hosts and possible sources of infection for other animals and people.(AU)


Tanto a presença de cães com dono quanto de cães vadios permitem a disseminação de Toxocara, e o parasita está presente no solo, na água e nos alimentos. Animais, incluindo cavalos, apresentam-se como hospedeiros definitivos e paratênicos. No México, o consumo de carne de cavalo é comum, e Toxocara é um parasita zoonótico. ELISA foi escolhido para análise, já que hospedeiros paratênicos não jogam ovos de Toxocara em suas fezes. O objetivo deste estudo foi identificar a presença de anticorpos anti-Toxocara por ELISA, em cavalos de trabalho e em cavalos para o consumo humano. As amostras de sangue foram retiradas de 188 cavalos: 94 cavalos de trabalho e 94 cavalos de trabalho do matadouro. Soros dos animais foram analisados por ELISA e 44,6% dos equinos apresentaram anticorpos anti-Toxocara. Cavalos adultos para abate têm 61,7% mais elevada a presença de anticorpos anti-Toxocara (P = 0,006). Anticorpos IgG Toxocara foram encontrados em cavalos, confirmando cavalos paratênicos como hospedeiros e possíveis fontes de infecção para outros animais e pessoas.(AU)


Subject(s)
Animals , Toxocara/classification , Immunoglobulin G/classification , Horses/immunology , Zoonoses
17.
Arq. bras. med. vet. zootec. (Online) ; 70(1): 1-5, jan.-fev. 2018. tab
Article in English | VETINDEX | ID: vti-19263

ABSTRACT

Both the presence of owned dogs and stray dogs allows the spread of Toxocara, a parasite whose eggs can be found in soil, water and food. Animals, including horses, serve as definitive and paratenic hosts. In México, where consumption of horse meat is common, Toxocara is a zoonotic parasite. The aim of this study was to identify the presence of anti-Toxocara antibodies in work horses and horses intended for human consumption by ELISA. ELISA was chosen for analysis as paratenic hosts do not shed Toxocara eggs in their feces. Blood samples were collected from a total of 188 horses, 94 of which were work horses and 94 horses from the slaughter house. Samples were analyzed by ELISA, and the general equine seroprevalence was found to be 44.6% (n = 188). Adult horses for slaughter had a 61.7% greater presence of anti-Toxocara antibodies (p = 0.006). Toxocara IgG antibodies were found in horses, confirming that horses are paratenic hosts and possible sources of infection for other animals and people.(AU)


Tanto a presença de cães com dono quanto de cães vadios permitem a disseminação de Toxocara, e o parasita está presente no solo, na água e nos alimentos. Animais, incluindo cavalos, apresentam-se como hospedeiros definitivos e paratênicos. No México, o consumo de carne de cavalo é comum, e Toxocara é um parasita zoonótico. ELISA foi escolhido para análise, já que hospedeiros paratênicos não jogam ovos de Toxocara em suas fezes. O objetivo deste estudo foi identificar a presença de anticorpos anti-Toxocara por ELISA, em cavalos de trabalho e em cavalos para o consumo humano. As amostras de sangue foram retiradas de 188 cavalos: 94 cavalos de trabalho e 94 cavalos de trabalho do matadouro. Soros dos animais foram analisados por ELISA e 44,6% dos equinos apresentaram anticorpos anti-Toxocara. Cavalos adultos para abate têm 61,7% mais elevada a presença de anticorpos anti-Toxocara (P = 0,006). Anticorpos IgG Toxocara foram encontrados em cavalos, confirmando cavalos paratênicos como hospedeiros e possíveis fontes de infecção para outros animais e pessoas.(AU)


Subject(s)
Animals , Immunoglobulin G/classification , Toxocara/classification , Horses/immunology , Zoonoses
18.
Pesqui. vet. bras ; 37(2): 195-203, fev. 2017. tab, graf
Article in Portuguese | LILACS (Americas), VETINDEX | ID: biblio-834022

ABSTRACT

O conhecimento do metabolismo dos animais é de suma importância para se obter sucesso em qualquer atividade que envolva rebanhos. Objetivou-se determinar o perfil bioquímico sérico de vacas Jersey clinicamente saudáveis no pré e pós-parto, mantidas em sistema de criação semi-intensivo na região de Uberlândia, Minas Gerais, Brasil. Realizou-se o exame clínico e coleta de sangue de 40 vacas da raça Jersey multíparas e lactantes em 15 momentos, entre -150 dias pré-parto até 60 dias pós-parto (DPP). No laboratório, foram analisadas as concentrações séricas de proteínas totais, albumina, globulinas, ureia, creatinina, ácidos graxos não esterificados (NEFA), ß-hidroxibutirato (BHBA), triglicerídeos, colesterol, lipoproteínas de alta densidade (HDL), lipoproteínas de muita baixa densidade (VLDL), lipoproteínas de baixa densi­dade (LDL), aspartato aminotransferase (AST), gama-glutamil transferase (GGT), creatina quinase (CK), cálcio, fósforo e magnésio. Dos 40 animais, apenas 21 vacas atenderam aos critérios de inclusão e seus dados foram utilizados. Procedeu-se o teste de Tukey para os dados paramétricos e para os dados não paramétricos realizou-se o teste de Kruskal Wallis na comparação entre os momentos avaliados. Não houve interferência do balanço energético negativo e da hipocalcemia subclínica na ocorrência de doenças uterinas e no desempenho reprodutivo. Concluiu-se que vacas da raça Jersey apresentam perfil bioquímico caracterizado por hiperglobulinemia durante o periparto, além de níveis elevados de triglicérides, entretanto, sem comprometimento da função hepática e desempenho reprodutivo.(AU)


The understanding of animal metabolism is important for the success of livestock activity. The aim of this study was to determine the serum biochemical profile of clinically healthy Jersey cows in pre and postpartum, housed in semi-intensive production system in Uberlândia, Minas Gerais, Brazil. Clinical examination and blood collection from 40 multiparous lactating dairy cows, between -150 days prepartum up to 60 days postpartum (DPP) were performed. At the laboratory, serum parameters of total proteins, albumin, globulins, urea, creatinine, non-esterified fatty acids (NEFA), ß-hydroxybutyrate (BHBA), triglycerides, cholesterol, high density lipoprotein (HDL), very low density lipoproteins (VLDL), low density lipoproteins (LDL), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), creatine kinase (CK), calcium, phosphorus and magnesium were analyzed. To the total of cows (n=40) enrolled, only 21 cows were complied with the inclusion criterias. It was proceeded the Tukey test for parametric data, and to the nonparametric data it was held the Kruskal Wallis test for the comparison between days evaluated. There was no interference of negative energy balance and subclinical hypocalcemia in the occurrence of uterine diseases and reproductive performance. In conclusion, Jersey cows have biochemical profile characterized by hyperglobulinemia during peripartum, and high levels of triglycerides, but without impaired liver function and reproductive performance.(AU)


Subject(s)
Animals , Female , Cattle , Immunoglobulin G/blood , Immunoglobulin M/blood , Metabolism/physiology , Reference Standards , Peripartum Period/metabolism , Triglycerides/blood , Hematologic Tests/veterinary
19.
R. bras. Med. equina ; 10(59): 20-22, mai. 2015. tab, graf
Article in Portuguese | VETINDEX | ID: vti-483027

ABSTRACT

Potros nascem sem qualquer defesa em decorrência da barreira placentária das éguas durante a gestação. O recém-nascido, quando exposto aos agentes infecciosos do ambiente, estará sem proteção e sobrisco de morte. A administração de colostro, rico em imunoglobulinas (Ig), nas primeiras 2 a 6 horas de vida é o procedimento mais adequado para transferir imunidade. Porém, falhas de transferência passiva (FTP) podem ocorrer e diversas técnicas para determinar a IgG sérica dos neonatos estão disponíveis, permitindo uma conduta rápida frente aos resultados, caso necessário. Niveis ;:::800 mgJdL de IgG caracterizam uma excelente transferência passiva. Niveis abaixo de 400 mg/dL requerem suplementação com colostro ou plasma equino e níveis entre 400-800 mgJdL necessitam apenas de monitoramento. Com a detecção dos níveis de IgG e suplementação, é possível minimizar os impactos causados pela falha na transferência passiva (FTP) e obter menores taxas de mortalidade equina.(AU)


Foals are bom without any immunitary defense whatsoever due to placental barrier in the maresduring pregnancy. The newbom, when exposed to infeccious agents in natural environment, will be defenselessand in danger of death. Colostrum administration (rich in IgG) during the first 2 to 6 hours of life constitutes themost adequate procedure to transfer immunit. Never the less, failures of passive transfer (FPT) can occur and several techniques are available to determine serum igG levels of newboms, allowing quick action to be taken incase it is necessary. Levels ;:::800 mg/dL of IgG caracterize an excelent passive transference. Levels below 400mg/dL require colostrum or equine plasma supplementation and levels between 400-800 mg/dL require monitoringonly. Detection of IgG levels and supplementation measures, make it possible to minimize the impacts caused by the failure of passive transfer (FPT) and to obtain lower rates of equine mortality.(AU)


Los potros nacen sin ninguna defensa en decurrencia de Ia barrera placentaria de Ias yeguas duranteIa gestación. EI recién nacido, cuando expuesto a los agentes infecciosos dei ambiente, estará sin proteccióny corriendo riesgo de muerte. La administración de calostro (rico en IgG), en Ias primeras 2 a 6 horas de vida, esel procedimiento más adecuado para transferir inmunidad. No obstante, falias en Ia transferencia pasiva (FTP)pueden ocurrir, siendo que están disponibles diversas técnicas para determinar Ia IgG sérica de los neonatos,permitiendo Ia tomada rápida de decisión ante los resultados, en caso de ser necesario. Los niveles ;:::800 mgldL de IgG caracterizan una excelente transferencia pasiva. Los níveles abajo de 400 mg/dL requieren Ia suplementación con calostro o plasma equino y 105 niveles entre 400-800 mg/dL necesitan apenas de monitoreamiento. Con Ia detección de 105 niveles de IgG y Ia suplementación, es posible minimizar 105 impactos causados porIa falia en Ia transferencia pasiva (FTP) y obtener menores tasas de mortalidad equina.(AU)


Subject(s)
Animals , Animals, Newborn/growth & development , Animals, Newborn/physiology , Colostrum/physiology , Immunoglobulins/therapeutic use , Immunization, Passive/veterinary , Horses/growth & development , Horses/physiology , Immunization, Passive/methods , Immunoglobulin G/analysis , IgG Deficiency/therapy , IgG Deficiency/veterinary , Mortality
20.
Braz. J. Microbiol. ; 46(3): 807-814, July-Sept. 2015. tab, ilus
Article in English | VETINDEX | ID: vti-17498

ABSTRACT

Lyme disease (LD) is a natural focal zoonotic disease caused by Borrelia burgdorferi, which is mainly transmitted through infected Ixodes ricinus tick bites. The presence and abundance of ticks in various habitats, the infectivity rate, as well as prolonged human exposure to ticks are factors that may affect the infection risk as well as the incidence of LD. In recent years, 20% to 25% of ticks infected with different borrelial species, as well as about 5,300 citizens with LD, have been registered in the Belgrade area. Many of the patients reported tick bites in citys grassy areas. The aim of this study was to assess the seroprevalence of B. burgdorferi in high-risk groups (forestry workers and soldiers) in the Belgrade area, and to compare the results with healthy blood donors. A two-step algorithm consisting of ELISA and Western blot tests was used in the study. Immunoreactivity profiles were also compared between the groups. The results obtained showed the seroprevalence to be 11.76% in the group of forestry workers, 17.14% in the group of soldiers infected by tick bites and 8.57% in the population of healthy blood donors. The highest IgM reactivity was detected against the OspC protein, while IgG antibodies showed high reactivity against VlsE, p19, p41, OspC, OspA and p17. Further investigations in this field are necessary in humans and animals in order to improve protective and preventive measures against LD..(AU)


Subject(s)
Humans , Animals , Male , Female , Adult , Middle Aged , Antibodies, Bacterial/blood , Borrelia burgdorferi/immunology , Borrelia burgdorferi/isolation & purification , Lyme Disease/epidemiology , Occupational Exposure , Enzyme-Linked Immunosorbent Assay , Forestry , Immunoglobulin G/blood , Immunoglobulin M/blood , Insect Vectors/microbiology , Ixodes/microbiology , Lyme Disease/microbiology , Lyme Disease/transmission , Military Personnel
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