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1.
BMC Microbiol ; 17(1): 202, 2017 Sep 21.
Article in English | MEDLINE | ID: mdl-28934943

ABSTRACT

BACKGROUND: Caseous lymphadenitis (CLA) is a disease that affects sheep, goats and occasionally humans. The etiologic agent is the Corynebacterium pseudotuberculosis bacillus. The objective of this study was to build a gene expression library from C. pseudotuberculosis and use immunoscreening to identify genes that encode potential antigenic proteins for the development of DNA and subunit vaccines against CLA. RESULTS: A wild strain of C. pseudotuberculosis was used for extraction and partial digestion of genomic DNA. Sequences between 1000 and 5000 base pairs (bp) were excised from the gel, purified, and the digested DNA fragments were joined to bacteriophage vector ZAP Express, packaged into phage and transfected into Escherichia coli. For immunoscreening a positive sheep sera pool and a negative sera pool for CLA were used. Four clones were identified that strongly reacted to sera. The clones were confirmed by polymerase chain reaction (PCR) followed by sequencing for genomic comparison of C. pseudotuberculosis in GenBank. The genes identified were dak2, fagA, fagB, NlpC/P60 protein family and LPxTG putative protein family. CONCLUSION: Proteins of this type can be antigenic which could aid in the development of subunit or DNA vaccines against CLA as well as in the development of serological tests for diagnosis. Immunoscreening of the gene expression library was shown to be a sensitive and efficient technique to identify probable immunodominant genes.


Subject(s)
Antigens, Bacterial/genetics , Antigens, Bacterial/immunology , Antigens, Bacterial/isolation & purification , Corynebacterium Infections/immunology , Corynebacterium Infections/veterinary , Corynebacterium pseudotuberculosis/genetics , Corynebacterium pseudotuberculosis/immunology , Lymphadenitis/veterinary , Animals , Antigens, Bacterial/blood , Bacteriophages/genetics , Base Sequence , Corynebacterium Infections/microbiology , Corynebacterium Infections/prevention & control , Corynebacterium pseudotuberculosis/pathogenicity , Databases, Nucleic Acid , Escherichia coli/genetics , Gene Expression Regulation, Bacterial , Gene Library , Genes, Bacterial/genetics , Genome, Bacterial , Goat Diseases/blood , Goat Diseases/immunology , Goat Diseases/microbiology , Goats , Lymphadenitis/immunology , Lymphadenitis/microbiology , Polymerase Chain Reaction/veterinary , Sheep , Sheep Diseases/blood , Sheep Diseases/immunology , Sheep Diseases/microbiology , Vaccines, DNA/therapeutic use
2.
Rev Bras Parasitol Vet ; 24(4): 387-95, 2015.
Article in English | MEDLINE | ID: mdl-26689177

ABSTRACT

The stable fly (Stomoxys calcitrans) has historically been a pest of dairy cattle and feedlots due to the availability of decaying plant matter mixed with animal excrements in such production systems. In the last few decades, stable fly outbreaks have also been reported in pasture-raised beef cattle, usually associated with wastes accumulated from animal feeding during winter, the introduction of large-scale crop operations near cattle ranches, and/or the inadvertent use of organic fertilizers. Population explosions of Stomoxys flies may also have natural causes, affecting not only domestic and/or wild animals but also humans. This article compiles information on stable fly outbreaks in Brazil and abroad and discusses their causes and consequences.


Subject(s)
Cattle Diseases/epidemiology , Disease Outbreaks/veterinary , Ectoparasitic Infestations/veterinary , Muscidae , Animals , Brazil/epidemiology , Cattle , Ectoparasitic Infestations/epidemiology , Seasons
3.
Rev. bras. parasitol. vet ; 24(4): 387-395, Oct.-Dec. 2015. graf
Article in English | LILACS | ID: lil-770313

ABSTRACT

Abstract The stable fly (Stomoxys calcitrans) has historically been a pest of dairy cattle and feedlots due to the availability of decaying plant matter mixed with animal excrements in such production systems. In the last few decades, stable fly outbreaks have also been reported in pasture-raised beef cattle, usually associated with wastes accumulated from animal feeding during winter, the introduction of large-scale crop operations near cattle ranches, and/or the inadvertent use of organic fertilizers. Population explosions of Stomoxys flies may also have natural causes, affecting not only domestic and/or wild animals but also humans. This article compiles information on stable fly outbreaks in Brazil and abroad and discusses their causes and consequences.


Resumo A mosca-dos-estábulos (Stomoxys calcitrans) tem sido historicamente uma praga em gado de leite e gado de corte em confinamento devido à disponibilidade de matéria orgânica vegetal em decomposição, misturada a dejetos animais, nestes sistemas de produção. Nas últimas décadas, surtos de infestação por esta mosca passaram a ocorrer também em rebanhos de corte mantidos extensivamente, geralmente associados ao acúmulo de resíduos de suplementação alimentar durante o inverno, introdução de culturas agrícolas em larga escala no entorno de propriedades pecuárias e/ou uso inadvertido de fertilizantes orgânicos. Eventualmente, explosões populacionais de Stomoxys podem ter causas naturais, afetando animais domésticos e/ou selvagens, além do próprio homem. Este artigo reúne informações sobre surtos da mosca-dos-estábulos no Brasil e em outros países e discute suas causas e consequências.


Subject(s)
Animals , Cattle , Muscidae , Cattle Diseases/epidemiology , Disease Outbreaks/veterinary , Ectoparasitic Infestations/veterinary , Seasons , Brazil/epidemiology , Ectoparasitic Infestations/epidemiology
4.
Biochem Genet ; 50(9-10): 657-69, 2012 Oct.
Article in English | MEDLINE | ID: mdl-22580793

ABSTRACT

The infectious prion protein PrP(Sc) is encoded by the PRNP gene. In cattle, insertion/deletion (indel) polymorphisms are among the changes that occur in this gene, the most studied of which are within intron 1 (12 bp) and the promoter region (23 bp). Sequence variants in this gene may affect the formation of PrP(Sc). In the present study, nucleotide variability in specific regions of the PRNP gene in Caracu cattle free of bovine spongiform encephalopathy was investigated to determine the genotypic profile of each animal within the group. Caracu cattle exhibited high allele frequency for the two polymorphic regions studied, 12ins (70 %) and 23ins (72.5 %), genotype frequencies of 50 % for 12ins/ins and 50 % for 23ins/del, and a high frequency of the 12ins-23ins haplotype (57.5 %). Of the 40 animals sampled, 15 had the 12ins-23ins/12ins-23ins diplotype.


Subject(s)
Encephalopathy, Bovine Spongiform/genetics , INDEL Mutation , Introns , Polymorphism, Genetic , Prions/genetics , Promoter Regions, Genetic , Animals , Base Sequence , Cattle , Chromosomes, Mammalian/genetics , DNA Mutational Analysis , Gene Frequency , Genetic Predisposition to Disease , Haplotypes , Heterozygote , Linkage Disequilibrium , Molecular Sequence Data , Prions/pathogenicity
5.
Vet Parasitol ; 187(3-4): 548-52, 2012 Jul 06.
Article in English | MEDLINE | ID: mdl-22309798

ABSTRACT

Bovine babesiosis caused by Babesia bovis remains an important constraint for the development of cattle industries worldwide. Effective control can be achieved by vaccination with live attenuated phenotypes of the parasite. However, these vaccines have a number of drawbacks, which justifies the search for better, safer vaccines. In recent years, a number of parasite proteins with immunogenic potential have been discovered. However, there is little information on the genetic conservation of these proteins among different parasite isolates, which hinders their assessment as immunogens. The aim of the present study was to evaluate the conservation of the genes ama-1, acs-1, rap-1, trap, p0 and msa2c among five Brazilian isolates of B. bovis. Through polymerase chain reaction, genetic sequencing and bioinformatics analysis of the genes, a high degree of conservation (98-100%) was found among Brazilian isolates of B. bovis and the T2Bo isolate. Thus, these genes are worth considering as viable candidates to be included in a recombinant cocktail vaccine for cattle babesiosis caused by B. bovis.


Subject(s)
Babesia bovis/genetics , Babesia bovis/metabolism , Cattle Diseases/parasitology , Gene Expression Regulation/physiology , Genetic Variation , Protozoan Proteins/metabolism , Amino Acid Sequence , Animals , Babesiosis/parasitology , Brazil/epidemiology , Cattle , Cattle Diseases/epidemiology , Conserved Sequence , Protozoan Proteins/genetics , Protozoan Proteins/immunology
6.
Braz. j. vet. res. anim. sci ; 49(5): 377-385, 2012.
Article in Portuguese | LILACS | ID: lil-687636

ABSTRACT

Considerando as limitações dos atuais métodos de controle contra a anaplasmose bovina, o desenvolvimento de uma vacina efetiva se faz necessário. A partir do advento da análise genômica e proteômica, novas proteínas de membrana de Anaplasma marginale foram identificadas como possíveis candidatas a componentes de uma vacina, tais como, VirB9, VirB10 e Fator Termo Instavél de Elongação de Peptídeos (EF-Tu). Embora estas proteínas ainda não estejam bem caracterizadas na membrana de A. marginale, a produção destas na forma recombinante (rVirB 9, rVirB10 e rEF-Tu) tem sido realizada, mas as mesmas ainda não foram exploradas em formulações vacinais. Neste trabalho, avaliou-se o uso de rVirB9, rVirB10 e rEF-Tu emulsionadas em adjuvante Montanide em camundongos. Nas condições testadas, verificou-se a indução de forte resposta imune humoral com a produção de IgG1 e IgG2a, sendo que as proporções dos níveis de produção destas subclasses indicam predomínio de IgG1. Entretanto, esplenócitos de animais, que foram injetados com rVirB9 ou rVirB10, produziram interferon-gama acima do limite de detecção do ensaio após estimulação in vitro, sinalizando assim resposta celular específica. Assim, novas avaliações serão realizadas com a finalidade de modular o perfil de resposta imune obtido em bovinos e avaliar a proteção contra A. marginale.


Considering the limitations of current methods of anaplasmosis control, the development of a more effective vaccine is required. Previous studies, using proteomic and genomic approaches, have identified new membrane proteins in Anaplasma marginale that may be vaccine candidates. These include VirB9, VirB10 and elongation factor-Tu (EFTu). Although the role of these proteins in the membrane of A. marginale has not been properly characterized, production of the recombinant proteins rVirB9, rVirB10, and rEF-Tu has been achieved. However, these recombinant proteins have not yet been exploited in vaccine formulations. The present study describes the use of rVirB9, rVirB10 and rEF-Tu, emulsificated in adjuvant Montanide, in mice. A strong humoral immune response was induced under these conditions, with both IgG1 and IgG2a production. The IgG2a/IgG1 ratios revealed a predominance of IgG1. However, splenocytes of the animals that received rVirB9 or rVirB10 produced high levels of gamma interferon after in vitro stimulation, indicating a specific cellular immune response to these proteins. Therefore, further studies are required to adjust the profile of the immune response in order to perform tests of protection against A. marginale in cattle.


Subject(s)
Animals , Anaplasma/pathogenicity , Mice/classification , Peptides/chemistry , Allergy and Immunology , Proteins/chemistry
7.
Rev Bras Parasitol Vet ; 20(4): 318-24, 2011.
Article in English | MEDLINE | ID: mdl-22166387

ABSTRACT

The current study aimed to investigate the seroprevalence of IgG antibodies to Anaplasma marginale in cattle from Maputo, Gaza and Inhambane provinces, south Mozambique. A total of 809 serum samples from cattle were obtained and tested by indirect enzyme-linked immunosorbent assay (i-ELISA). The chi-square test at 5% significance was used to assess the association between seroprevalence and the variables gender, age and geographic origin of animals. The overall seropositivity was 76.5% (n = 619) and anti-A. marginale antibodies were detected in 89.1% (n = 156), 68.4% (n = 308) and 84.2% (n = 155) of the animals in the provinces of Maputo, Gaza and Inhambane, respectively. A significant association (p < 0.05) was found with the geographic origin of the animals, while sex had no significant relationship. The frequencies of seropositive in the age groups were 63.2% (n = 72), 80.0% (n = 92), 83.1% (n = 98) and 77.3% (n = 357) for animals <12; >12 and ≤24; >24 and ≤36; >36 months, respectively. These results indicate that in southern Mozambique there are areas of enzootic stability to A. marginale. Thus, epidemiological monitoring is required to monitor the immune status of animals in the region.


Subject(s)
Anaplasma marginale/immunology , Anaplasmosis/blood , Antibodies, Bacterial/blood , Cattle Diseases/blood , Cattle/blood , Immunoglobulin G/blood , Anaplasmosis/epidemiology , Animals , Cattle/immunology , Cattle Diseases/epidemiology , Female , Male , Mozambique , Seroepidemiologic Studies
8.
Rev. bras. parasitol. vet ; 20(4): 318-324, Dec. 2011. mapas, tab
Article in English | LILACS | ID: lil-609126

ABSTRACT

The current study aimed to investigate the seroprevalence of IgG antibodies to Anaplasma marginale in cattle from Maputo, Gaza and Inhambane provinces, south Mozambique. A total of 809 serum samples from cattle were obtained and tested by indirect enzyme-linked immunosorbent assay (i-ELISA). The chi-square test at 5 percent significance was used to assess the association between seroprevalence and the variables gender, age and geographic origin of animals. The overall seropositivity was 76.5 percent (n = 619) and anti-A. marginale antibodies were detected in 89.1 percent (n = 156), 68.4 percent (n = 308) and 84.2 percent (n = 155) of the animals in the provinces of Maputo, Gaza and Inhambane, respectively. A significant association (p < 0.05) was found with the geographic origin of the animals, while sex had no significant relationship. The frequencies of seropositive in the age groups were 63.2 percent (n = 72), 80.0 percent (n = 92), 83.1 percent (n = 98) and 77.3 percent (n = 357) for animals <12; >12 and <24; >24 and <36; >36 months, respectively. These results indicate that in southern Mozambique there are areas of enzootic stability to A. marginale. Thus, epidemiological monitoring is required to monitor the immune status of animals in the region.


O objetivo do presente estudo foi investigar a soroprevalência de anticorpos da classe IgG contra Anaplasma marginale em bovinos de corte da região Sul de Moçambique. Para esse efeito, 809 amostras de soro foram coletadas e avaliadas pelo ensaio imunoadsorção enzimático indireto (ELISA-i). O teste Qui-Quadrado, a 5 por cento de significância, foi utilizado para avaliar a associação entre a soroprevalência e as variáveis sexo, idade e origem geográfica dos animais. A soropositividade geral foi de 76,5 por cento (n = 619), e anticorpos anti-A. marginale foram detectados em 89,1 por cento (n = 156), 68,4 por cento (n = 308) e 84,2 por cento (n = 155) dos animais nas províncias de Maputo, Gaza e Inhambane, respectivamente. Uma associação significativa (p < 0,05) foi observada entre a origem geográfica dos animais, enquanto o sexo não demonstrou uma relação significativa. A frequência de soropositivos com relação à faixa etária foi de 63,2 por cento (n = 72), 80,0 por cento (n = 92), 83,1 por cento (n = 98) e 77,3 por cento (n = 357) para animais de <12; >12 a <24; >24 <36; >36 meses, respectivamente. Os resultados demonstram que, no Sul de Moçambique, existem áreas de estabilidade enzoótica para A. marginale, em animais maiores de 12 meses. Assim, monitoramento epidemiológico deve ser realizado para o acompanhamento do status imunológico dos animais na região.


Subject(s)
Animals , Cattle , Female , Male , Anaplasma marginale/immunology , Anaplasmosis/blood , Antibodies, Bacterial/blood , Cattle Diseases/blood , Cattle/blood , Immunoglobulin G/blood , Anaplasmosis/epidemiology , Cattle Diseases/epidemiology , Mozambique , Seroepidemiologic Studies
9.
Mem Inst Oswaldo Cruz ; 106(6): 763-8, 2011 Sep.
Article in English | MEDLINE | ID: mdl-22012234

ABSTRACT

This work reports a survey of Leptospira spp in pampas deer (Ozotoceros bezoarticus) in the Pantanal wetlands of the state of Mato Grosso do Sul, Brazil by serology and polymerase chain reaction (PCR). Seventy pampas deer were captured in the dry season and surveyed using PCR, microscopic agglutination test (MAT) (n = 51) and by both techniques (n = 47). PCR detected infections in two pampas deer and MAT detected infections in three. Through sequencing and phylogenetic analyses, the PCR-amplified fragment detected in deer was identified as Leptospira interrogans. Serovars Pomona and Butembo were detected using MAT and the highest titre was 200 for serovar Pomona. Epidemiological aspects of the findings are discussed.


Subject(s)
Antibodies, Bacterial/blood , Deer/microbiology , Leptospira interrogans/isolation & purification , Leptospirosis/veterinary , Agglutination Tests/veterinary , Animals , Brazil/epidemiology , Female , Leptospira interrogans/immunology , Leptospira interrogans serovar pomona/immunology , Leptospira interrogans serovar pomona/isolation & purification , Leptospirosis/diagnosis , Leptospirosis/epidemiology , Male , Phylogeny , Polymerase Chain Reaction/veterinary , Seasons , Wetlands
10.
Mem. Inst. Oswaldo Cruz ; 106(6): 763-768, Sept. 2011. tab
Article in English | LILACS | ID: lil-602063

ABSTRACT

This work reports a survey of Leptospira spp in pampas deer (Ozotoceros bezoarticus) in the Pantanal wetlands of the state of Mato Grosso do Sul, Brazil by serology and polymerase chain reaction (PCR). Seventy pampas deer were captured in the dry season and surveyed using PCR, microscopic agglutination test (MAT) (n = 51) and by both techniques (n = 47). PCR detected infections in two pampas deer and MAT detected infections in three. Through sequencing and phylogenetic analyses, the PCR-amplified fragment detected in deer was identified as Leptospira interrogans. Serovars Pomona and Butembo were detected using MAT and the highest titre was 200 for serovar Pomona. Epidemiological aspects of the findings are discussed.


Subject(s)
Animals , Female , Male , Antibodies, Bacterial/blood , Deer/microbiology , Leptospira interrogans/isolation & purification , Leptospirosis/veterinary , Agglutination Tests/veterinary , Brazil/epidemiology , Leptospira interrogans serovar pomona/immunology , Leptospira interrogans serovar pomona/isolation & purification , Leptospira interrogans/immunology , Leptospirosis/diagnosis , Leptospirosis/epidemiology , Phylogeny , Polymerase Chain Reaction/veterinary , Seasons , Wetlands
11.
Rev. bras. reumatol ; 48(2): 74-85, mar.-abr. 2008. tab
Article in Portuguese | LILACS | ID: lil-485822

ABSTRACT

A ocorrência de manifestações clínicas e laboratoriais semelhantes às encontradas na doença de Lyme e da coinfecção com a babesiose já foi demonstrada em trabalhos anteriores em adultos, porém não existem estudos desta natureza em crianças. OBJETIVO: Caracterizar o perfil clínico-epidemiológico da síndrome de Lyme-Símile em crianças do Estado de Mato Grosso do Sul e avaliar a prevalência dos anticorpos anti-Borrelia burgdorferi e anti-Babesia bovis no soro de pacientes que preencheram os critérios estabelecidos. MÉTODOS: 100 pacientes entre 9 meses e 16 anos de idade foram submetidos à pesquisa dos anticorpos pela técnica de ELISA e a soroprevalência foi comparada com um grupo-controle. RESULTADOS: Positividade para anticorpos anti-B. burgdorferi ocorreu em 27 por cento dos pacientes com suspeita clínica, sendo 17 por cento IgM e 12 por cento IgG. As manifestações articulares ocorreram em 21 pacientes, as manifestações cutâneas em três pacientes e as manifestações neurológicas em três pacientes. A prevalência de anticorpos contra B. burgdorferi nos pacientes do grupo-controle foi de 15 por cento (p < 0,05). Os anticorpos anti-B. bovis estiveram presentes em 24 por cento dos pacientes suspeitos e em 3 por cento do grupo-controle (p < 0,05). Concomitância dos anticorpos ocorreu em 10 pacientes com suspeita clínica e em nenhum controle. CONCLUSÃO: Os resultados deste estudo evidenciam a etiologia de caráter infeccioso e reacional das manifestações clínicas encontradas nos pacientes, podendo caracterizar uma síndrome, que possivelmente ocorra na presença de múltiplos microrganismos e está relacionada com carrapatos. Foi encontrada freqüência superior de anticorpos contra Borrelia e Babesia nos pacientes em relação aos controles. Embora pequena, essa diferença foi estatisticamente significante. Este achado não atesta que o quadro clínico dos pacientes seja causado por espécies de Borrelia ou Babesia, mas levantam a possibilidade de participação...


The occurence of clinical and laboratory manifestations similar to the Lyme disease and the coinfection with babesiosis was already demonstraded in previous researches with adult patients. However, there are no studies in children. OBJECTIVE: To identify the clinical-epidemiological profile of the Lyme Simile Syndrome in children of the State of Mato Grosso do Sul and to evaluate the prevalence of antibodies against Borrelia burgdorferi and Babesia bovis in the serum of patients that had fulfilled the established criteria. METHODS: One hundred patients (age range: 9 months and 16 years-old) were screened for the presence of those antibodies, using ELISA, comparing to a control group. RESULTS: Antibodies against B. burgdoferi were found in 27 percent of the patients with a clinical picture. The articular manifestations occurred in 21 patients, cutaneous in 3 and neurological in 3. The prevalency in the control group was 15 percent (p < 0.05). The antibodies for Babesia bovis were present in 24 percent of suspect patients and in 3 percent of the control group (p < 0.05). Concomitance of the two antibodies occurred in 10 patients with clinical suspect and no one of control group. CONCLUSION: The results found in this study suggest the infective and reactive character of the clinical manifestations of the patients, which can characterize a Syndrome, which possibly occurs in the presence of multiple microorganisms that can be associated with tick-borne. It was found a higher frequency of antibodies against borrelia and babesia in patients in relation to the controls. Although small, this difference was statistically significant. This finding does not certify that the clinical features of patients is caused by species of borrelia or babesia, but raised the possibility of involvement of some infectious agent that could be related to these micro-organisms. The studies should continue in order to improve the delineation of this syndrome and to...


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Babesiosis , Borrelia , Borrelia burgdorferi , Borrelia burgdorferi Group , Borrelia Infections , Lyme Disease , Tick-Borne Diseases
12.
Mem Inst Oswaldo Cruz ; 103(1): 1-13, 2008 Feb.
Article in English | MEDLINE | ID: mdl-18368231

ABSTRACT

The biology, epidemiology, pathogenesis, diagnostic techniques, and history of the introduction of Trypanosoma (Duttonella) vivax in the New World are reviewed. The two main immunological responses of trypanosome-infected animals - antibody production and immunodepression - are discussed in the context of how these responses play a role in disease tolerance or susceptibility. Isolation and purification of T. vivax are briefly discussed. The recent reports of bovine trypanosomiasis diagnosed in cattle on farms located in the Pantanal region of the states of Mato Grosso do Sul and Mato Grosso, Brazil, are also discussed.


Subject(s)
Trypanosoma vivax , Trypanosomiasis, Bovine , Africa/epidemiology , Animals , Brazil/epidemiology , Cattle , Genetic Variation , Trypanosoma vivax/classification , Trypanosoma vivax/genetics , Trypanosoma vivax/immunology , Trypanosoma vivax/pathogenicity , Trypanosomiasis, Bovine/diagnosis , Trypanosomiasis, Bovine/epidemiology , Trypanosomiasis, Bovine/parasitology , Trypanosomiasis, Bovine/transmission
13.
Mem. Inst. Oswaldo Cruz ; 103(1): 1-13, Feb. 2008. ilus, graf
Article in English | LILACS | ID: lil-478878

ABSTRACT

The biology, epidemiology, pathogenesis, diagnostic techniques, and history of the introduction of Trypanosoma (Duttonella) vivax in the New World are reviewed. The two main immunological responses of trypanosome-infected animals - antibody production and immunodepression - are discussed in the context of how these responses play a role in disease tolerance or susceptibility. Isolation and purification of T. vivax are briefly discussed. The recent reports of bovine trypanosomiasis diagnosed in cattle on farms located in the Pantanal region of the states of Mato Grosso do Sul and Mato Grosso, Brazil, are also discussed.


Subject(s)
Animals , Cattle , Trypanosoma vivax , Trypanosomiasis, Bovine , Africa/epidemiology , Brazil/epidemiology , Genetic Variation , Trypanosoma vivax/classification , Trypanosoma vivax/genetics , Trypanosoma vivax/immunology , Trypanosoma vivax/pathogenicity , Trypanosomiasis, Bovine/diagnosis , Trypanosomiasis, Bovine/epidemiology , Trypanosomiasis, Bovine/parasitology , Trypanosomiasis, Bovine/transmission
14.
Hig. aliment ; 21(153): 53-58, jul.-ago. 2007.
Article in Portuguese | LILACS | ID: lil-487019

ABSTRACT

Os sorotipos de salmonelas paratifóides, tais como, Salmonella enteritidis e Salmonella typhimurium acometem diversas espécies de animais e possuem significado em saúde pública, como agentes etiológicos da salmonelose humana.A indústria avícola atende a uma série de exigências para o controle higiênico-sanitário dos plantéis e produtos avícolas. A legislação inclui procedimentos de campo, de abate e de processamento, rotulagem, diagnóstico laboratorial e certificação de produtos, a fim de evitar a transmissão de Salmonella sp. para outros animais e seres humanos. As tecnologias de diagnóstico de Salmonella sp. confiáveis e rápidas são essenciais para que a indústria avícola atenda às exigências legais e comerciais e diminua o tempo de estocagem dos produtos em câmaras e contêineres frigoríficos. Esta revisão objetiva abordar os principais assuntos relacionados ao diagnóstico imunológico e molecular de Salmonella sp. e destacar a importância do diagnóstico rápido deste patógeno para a indústria avícola nacional.


Subject(s)
Animals , Bacillus Gaertner/isolation & purification , Poultry Diseases/diagnosis , Food Industry , Poultry , Salmonella Infections, Animal/diagnosis , Brazil , Colony Count, Microbial/veterinary , Enzyme-Linked Immunosorbent Assay , Species Specificity , Immunologic Tests , Polymerase Chain Reaction/methods
15.
Ciênc. rural ; 35(4): 952-955, jul.-ago. 2005. ilus
Article in Portuguese | LILACS | ID: lil-416007

ABSTRACT

Os objetivos deste trabalho foram diagnosticar Aelurostrongylus abstrusus por meio das técnicas de histologia e impressão de tecido pulmonar de gato doméstico e realizar a caracterização morfométrica de ovos e mórulas desse nematódeo. Pela histologia, os ovos (n=100) mediram, em média, 83,4 x 65,5mim, índice morfométrico (IM) 0,8 e as mórulas (n=100) mediram, em média, 45,4 x 31,8mim, IM 0,7. Pela impressão de pulmão, os ovos (n=100) mediram, em média, 105,3 x 93,6mim, IM 0,9, e as mórulas (n=100) mediram, em média, 43,1 x 36,5mim, IM 0,8. A utilização da técnica de impressão de tecido permitiu a observação das mesmas formas parasitárias visualizadas histologicamente. Os resultados sugerem a viabilidade da utilização dessa técnica no diagnóstico pós-morte de A. abstrusus.


Subject(s)
Diagnosis , Helminths , Histology
16.
Ciênc. rural ; 34(1): 201-205, jan.-fev. 2004. tab
Article in Portuguese | LILACS | ID: lil-358331

ABSTRACT

Pesquisou-se a presença de anticorpos contra Borrelia burgdorferi latu sensu em cäes de áreas rurais de sete municípios do Estado do Rio de Janeiro, pelo ensaio imunoenzimático indireto, associando-se os resultados com a presença de carrapatos nestes animais. De 199 cäes examinados, 15,58 por cento estavam positivos, com títulos que variaram de 400 (13,57 por cento) a 1600 (0,5 por cento). Os casos positivos se distribuíram uniformemente nos sete municípios. Näo houve diferença estatística (P > 0,05) de soropositivos entre as faixas etárias dos cäes acima de seis meses. Carrapatos foram encontrados e coletados em 71 (35,68 por cento) cäes, dos quais 24,1 por cento estavam infestados com Amblyomma cajennense, 13,6 por cento com Rhipicephalus sanguineus, 2,5 por cento com Amblyomma aureolatum e 1,5 por cento com Amblyomma ovale. Dos animais soropositivos para B. burgdorferi, 38,7 por cento apresentavam A. cajennense e 22,6 por cento apresentavam R. sanguineus, näo havendo, entretanto, correlaçäo positiva entre a presença do carrapato e sorologia positiva.

17.
Mem Inst Oswaldo Cruz ; 98(3): 311-8, 2003 Apr.
Article in English | MEDLINE | ID: mdl-12886408

ABSTRACT

This paper reports a case of coinfection caused by pathogens of Lyme disease and babesiosis in brothers. This was the first case of borreliosis in Brazil, acquired in Cotia County, State of S o Paulo, Brazil. Both children had tick bite history, presented erythema migrans, fever, arthralgia, mialgia, and developed positive serology (ELISA and Western-blotting) directed to Borrelia burgdorferi G 39/40 and Babesia bovis antigens, mainly of IgM class antibodies, suggestive of acute disease. Also, high frequencies of antibodies to B. bovis was observed in a group of 59 Brazilian patients with Lyme borreliosis (25.4%), when compared with that obtained in a normal control group (10.2%) (chi-square = 5.6; p < 0.05). Interestingly, both children presented the highest titers for IgM antibodies directed to both infective diseases, among all patients with Lyme borreliosis.


Subject(s)
Babesia bovis/immunology , Babesiosis/immunology , Borrelia burgdorferi/immunology , Insect Bites and Stings/complications , Lyme Disease/immunology , Ticks , Animals , Antibodies, Bacterial/blood , Antibodies, Protozoan/blood , Babesiosis/complications , Blotting, Western , Brazil , Cattle , Child , Enzyme-Linked Immunosorbent Assay , Humans , Lyme Disease/complications , Male
18.
Mem. Inst. Oswaldo Cruz ; 98(3): 311-318, Apr. 2003. ilus
Article in English | LILACS | ID: lil-340107

ABSTRACT

This paper reports a case of coinfection caused by pathogens of Lyme disease and babesiosis in brothers. This was the first case of borreliosis in Brazil, acquired in Cotia County, State of São Paulo, Brazil. Both children had tick bite history, presented erythema migrans, fever, arthralgia, mialgia, and developed positive serology (ELISA and Western-blotting) directed to Borrelia burgdorferi G 39/40 and Babesia bovis antigens, mainly of IgM class antibodies, suggestive of acute disease. Also, high frequencies of antibodies to B. bovis was observed in a group of 59 Brazilian patients with Lyme borreliosis (25.4 percent), when compared with that obtained in a normal control group (10.2 percent) (chi-square = 5.6; p < 0.05). Interestingly, both children presented the highest titers for IgM antibodies directed to both infective diseases, among all patients with Lyme borreliosis


Subject(s)
Animals , Male , Child , Cattle , Babesia bovis , Babesiosis , Borrelia burgdorferi , Insect Bites and Stings , Lyme Disease , Ticks , Antibodies, Bacterial , Antibodies, Protozoan , Babesiosis , Blotting, Western , Brazil , Enzyme-Linked Immunosorbent Assay , Lyme Disease
19.
Ciênc. rural ; 31(2): 309-314, mar.-abr. 2001. tab, graf
Article in Portuguese | LILACS | ID: lil-301454

ABSTRACT

Realizou-se a pesquisa de anticorpos da classe IgG antiAnaplasma marginale através do ensaio de imunoadsorçäo enzimática (ELISA) indireto em 223 amostras de soros de bovinos provenientes de oito municípios da mesorregiäo do Médio Paraíba, estado do Rio de Janeiro. A prevalência observada foi de 98,21 por cento. Das amostras positivas, 36,32 por cento possuíam o título de 1:500, 43,50 por cento com título de 1:1000, 12,56 por cento com título de 1:2000, 3,59 por cento com título de 1:4000, 1,79 por cento com título de 1:8000, 0,45 por cento com título de 1:1600 e 1,79 por cento foram soronegativos. Procedeu-se a avaliaçäo da prevalência por grupos etários de 1 a 3 anos (n=53), 3 a 6 anos (n=71) e > 6 anos (n=99), na qual 96,23 por cento, 100 por cento e 97,98 por cento dos animais foram soropositivos, respectivamente. A análise em relaçäo à aptidäo zootécnica revelou que 100 por cento dos animais com aptidäo para corte (n=38) e 97,84 por cento com aptidäo para leite (n=185) reagiram ao ensaio. Dos animais estudados, 183 eram fêmeas e 40 machos e, destes, 98,91 por cento e 95,00 por cento foram positivos, respectivamente. A análise estatística demonstrou näo haver diferença significativa (P > 0,05), de prevalência, entre idades, aptidöes zootécnicas e entre sexos. Houve diferença significativa (P < 0,0001) de soropositivos entre os municípios. A regiäo foi caracterizada como uma área de estabilidade enzoótica para A. marginale.


Subject(s)
Animals , Male , Female , Cattle , Anaplasma , Anaplasmosis , Cattle Diseases/epidemiology , Cattle Diseases/prevention & control , Prevalence , Seroepidemiologic Studies , Enzyme-Linked Immunosorbent Assay
20.
Braz. arch. biol. technol ; 43(3): 307-12, set. 2000. ilus, tab
Article in English | LILACS | ID: lil-285083

ABSTRACT

Cinquenta e seis gambás (Didelphis aurita) foram capturados no campus da Universidade Federal Rural do Rio de Janeiro, Seropédica - Rio de Janeiro, com o intuito de se investigar a ocorrência de Borrelia sp. entre eles, associada ao estudo da espiroquetemia e de seus ectoparasitos. Amostras de sangue dos animais foram examinadas à microscopia de campo escuro e contraste de fase, além deste ter se destinado à obtençäo de esfregaços sanguíneos, corados pelo método de Giemsa. Näo houve relaçäo entre os resultados obtidos através dos exames diretos do sangue (13 gambás positivos para Borrelia sp.) e aqueles observados nos esfregaços sanguíneos (dois animais positivos), o que demonstra a baixa eficácia desta técnica. Estudos sobre a parasitemia de 37 animais mantidos em cativeiro, assim como as várias recapturas nas quais animais uma vez negativos mostraram-se positivos dias mais tarde, revelaram que os estudos hemoscópicos podem ser utilizados eficientemente como ferramentas de diagnóswtico. Ectoparasitas colhidos de nove animais foram classificados. Houve ocorrência de ninfas Amblyomma cajannense e adultos Ctenocephalides sp.


Subject(s)
Borrelia , Epidemiology , Marsupialia , Opossums , Public Health , Azure Stains , Lyme Disease/epidemiology , Ectoparasitic Infestations/epidemiology , Nymph , Parasitemia/diagnosis , Specimen Handling
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