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1.
Braz. j. med. biol. res ; 49(8): e5341, 2016. tab, graf
Article in English | LILACS | ID: lil-787390

ABSTRACT

Lymph node metastases are an independent prognosis factor in gastric carcinoma (GC) patients. Radical lymphadenectomy can improve survival but it can also increase surgical morbidity. As a principle, sentinel node (SN) navigation surgery can avoid unnecessary lymphadenectomy without compromising prognosis. In this pilot study, 24 patients with untreated GC were initially screened for SN navigation surgery, of which 12 were eligible. Five patients had T2 tumors, 5 had T3 tumors and 2 had T1 tumors. In 33% of cases, tumor diameter was greater than 5.0 cm. Three hundred and eighty-seven lymph nodes were excised with a median of 32.3 per patient. The SN navigation surgery was feasible in all patients, with a median of 4.5 SNs per patient. The detection success rate was 100%. All the SNs were located in N1 and N2 nodal level. In 70.9% of cases, the SNs were located at lymphatic chains 6 and 7. The SN sensitivity for nodal staging was 91.6%, with 8.3% of false negative. In 4 patients who were initially staged as N0, the SNs were submitted to multisection analyses and immunohistochemistry, confirming the N0 stage, without micrometastases. In one case initially staged as negative for nodal metastases based on SN analyses, metastases in lymph nodes other than SN were found, resulting in a 20% skip metastases incidence. This surgery is a reproducible procedure with 100% detection rate of SN. Tumor size, GC location and obesity were factors that imposed some limitations regarding SN identification. Results from nodal multisection histology and immunohistochemistry analysis did not change initial nodal staging.


Subject(s)
Humans , Rosaniline Dyes/administration & dosage , Stomach Neoplasms/surgery , Carcinoma/surgery , Technetium/administration & dosage , Sentinel Lymph Node Biopsy/methods , Carcinoma/pathology , Pilot Projects , Coloring Agents/administration & dosage , Neoplasm Grading , Lymph Nodes/pathology , Lymph Nodes/diagnostic imaging , Lymphatic Metastasis
2.
Arq. bras. med. vet. zootec ; 66(6): 1909-1916, 12/2014. tab
Article in English | LILACS | ID: lil-735775

ABSTRACT

New approaches are needed to quickly indicate possible contamination of UHT milk, among them the technique of ATP-Bioluminescence. Therefore, the aim of this study was to compare the results of culture methods with the results of ATP-Bioluminescence technique of 102 UHT whole milk samples incubated at 48, 72, and 168 hours. UHT milk samples were analyzed for the presence of mesophilic and psychrotrophic aerobic microorganisms using Plate Count Agar (PCA), Brain-Heart Infusion (BHI) media and PetrifilmTM Aerobic Count (AC) plates. The ATP-Bioluminescence technique was applied through the Microbial Luminescent Screening (MLS) system. Significant correlations were found between counts of aerobic mesophilic microorganisms on PCA, PetrifilmTM AC, BHI and results of ATP bioluminescence technique (P≤0.05). The ATP-Bioluminescence technique had higher correlation with counting method in PCA than BHI media. At lower pass/fail limits of Relative Light Units (60, 50, 45 and 40 RLU), the number of samples identified as positive increased and statistically agreed with aerobic mesophilic microorganism counts (P>0.05). For the dairy industry, the ATP-Bioluminescence technique may become an important tool that assists the official methods to quickly monitor the microbiological quality of UHT milk though this will likely require a threshold below 150 RLU...


Novos métodos são necessários para detectar de forma rápida a contaminação do leite UAT, entre eles, a técnica de ATP-Bioluminescência. Portanto, objetivou-se comparar os resultados de métodos de cultura tradicionais com os resultados de ATP-Bioluminescência de 102 amostras de leite UAT integral incubadas por 48, 72 e 168 horas. Os leites UAT foram analisados quanto à presença de micro-organismos aeróbicos mesófilos e psicrotróficos usando os ágares PCA, BHI e placas PetrifilmTM AC. A técnica de ATP-Bioluminescência foi aplicada por meio do sistema Microbial Luminescent Screening (MLS). Significantes correlações foram obtidas entre as contagens de micro-organismos mesófilos aeróbios em PCA, PetrifilmTM AC, BHI e os resultados da técnica de ATP-Bioluminescência (p<0,05). A técnica de ATP-Bioluminescência tem maior correlação com o método de contagem em meio PCA que BHI. Quando valores limites de Unidades Relativas de Luz (60, 50, 45 e 40 RLU) foram menores, o número de amostras identificadas como positivas aumentou e concordou estatisticamente com a contagem de micro-organismos mesófilos aeróbios (P>0,05). Para as indústrias de laticínios, a técnica de ATP-Bioluminescência pode se tornar uma ferramenta auxiliar aos métodos oficiais para o monitoramento rápido da qualidade microbiológica do leite UAT, desde que sejam utilizados limites abaixo de 150 RLU...


Subject(s)
Food Analysis/methods , Food Quality , Dairy Products/analysis , Milk/microbiology , Food Contamination/analysis , Dairying/methods
3.
Arq. bras. med. vet. zootec ; 65(2): 595-600, abr. 2013. tab
Article in Portuguese | LILACS | ID: lil-673140

ABSTRACT

Embora métodos tradicionais sejam utilizados na avaliação microbiológica de produtos UAT, metodologias rápidas, baseadas em ATP-Bioluminescência, têm sido desenvolvidas. Os resultados da aplicação dessa técnica em 54 amostras de bebida láctea UAT achocolatada e 12 de creme de leite UAT foram comparados com os resultados de métodos microbiológicos, utilizando-se diferentes meios de cultura e tempos de incubação das referidas amostras. A técnica de ATP-Bioluminescência foi aplicada por meio do sistema MLS, e os resultados foram expressos em unidades relativas de luz (RLU). Em todos os tempos de incubação - 48, 72 e 168 horas - , as amostras apresentaram contagens baixas de microrganismos mesófilos e psicrotróficos aeróbios quando analisadas em meio PCA, BHI, PetrifilmTM AC e por ATP-Bioluminescência (<150 RLU), demonstrando alta especificidade da técnica. Apenas uma amostra de creme de leite UAT apresentou contagem de mesófilos aeróbios acima do padrão estabelecido pela legislação brasileira (<100 UFC/mL) quando analisada em meio PCA (260 UFC/mL) e PetrifilmTM AC (108 UFC/mL), no tempo de 168 horas. Essa alta contagem de microrganismos mesófilos aeróbios também foi detectada pela técnica de ATP-Bioluminescência (416 RLU). Os resultados da técnica de ATP-Bioluminescência foram iguais aos resultados em meio PCA, BHI e PetrifilmTM AC.


Although traditional methods are used for the microbiological evaluation of UHT products, rapid methodologies based on ATP-Bioluminescence have been developed. The results of applying this technique in 54 samples of chocolate UHT milk drink and 12 of UHT milk cream were compared with the results of microbiological methods, using different culture media and incubation times for the referred samples. The ATP-Bioluminescence technique was applied through the MLS system and the results were expressed as relative light units (RLU). In all incubation times - 48, 72, and 168 hours - , the samples showed lower counts of mesophilic and psychrotrophic aerobic microorganisms when analyzed using PCA, BHI, PetrifilmTM AC and ATP-Bioluminescence (<150RLU), demonstrating the technique's high specificity. Only one sample of UHT milk cream showed a mesophilic aerobic count above the standard established by Brazilian legislation (<100CFU/mL) when analyzed in PCA (260 CFU/mL) and PetrifilmTM AC (108CFU/mL) at 168 hours. This high count of aerobic mesophilic microorganisms was also detected by the ATP-Bioluminescence (416 RLU) technique. The results of the ATP-Bioluminescence technique were equal to the results in PCA, BHI and PetrifilmTM AC.


Subject(s)
Animals , Food Quality , Luminescent Proteins , Microbiology , Beverages/analysis , Dairy Products/analysis
4.
Braz. j. microbiol ; 44(1): 145-151, 2013. tab
Article in English | LILACS | ID: lil-676900

ABSTRACT

Diarrhoea among growing and finishing pigs is an important problem in many herds. The prevalence of L. intracellularis, B. pilosicoli, B. hyodysenteriae, Salmonella spp., enterotoxigenic E. coli, Trichuris suis and the occurrence of mixed infection were investigated. Fecal samples for forty-six herds with diarrhea or a history of diarrhea were randomly collected in Minas Gerais state, Brazil. The enteric pathogens were detected by culture (E. coli and Salmonella sp.), PCR (L. intracellularis and Brachyspira spp.) and eggs counts (T. suis). The overall herd prevalence of L. intracellularis, Salmonella enterica serotype Typhimurium and enterotoxigenic E. coli were 19.56%, 6.52%, 10.86% respectively. Mixed infection was diagnosed in 30.43% of herds, and L. intracellularis and Salmonella enterica serotype Typhimurium are main pathogens association (10.87%). B. pilosicoli was diagnosed only in two herds, always associated with mixed infections. B. hyodysenteriae and T. suis were not demonstrated in any sample. These pathogens have been reported world-wide but studies regarding epidemiology in Brazil are few. This study contributes to establish of prevention programs for the control enteropathogens in grower finish herds in Brazil.


Subject(s)
Animals , Diagnostic Techniques and Procedures , Dysentery, Bacillary/diagnosis , Enterobacteriaceae/isolation & purification , Enterobacteriaceae/pathogenicity , In Vitro Techniques , Enterobacteriaceae Infections/diagnosis , Swine , Diagnosis , Epidemiology , Methods , Methods , Virulence
5.
Arq. bras. med. vet. zootec ; 63(4): 1016-1021, ago. 2011. graf, tab
Article in English | LILACS | ID: lil-599625

ABSTRACT

A infecção por Brucella ovis é considerada uma das principais causas de epididimite e infertilidade em carneiros, resultando em falhas reprodutivas e perdas econômicas significativas em rebanhos ovinos ao redor do mundo. O estudo teve o objetivo de avaliar três testes sorológicos disponíveis para o diagnóstico da brucelose ovina por B. ovis, utilizando 181 soros ovinos. Amostras de soro provenientes de carneiros experimentalmente infectados foram coletadas ao longo de 192 dias pós-infecção (n=117) e durante o período pré-infecção (n=9). Adicionalmente, amostras de soro foram obtidas de ovinos provenientes de um rebanho livre para B. ovis (n=55). As técnicas de imunodifusão em gel de agar (IDGA), utilizando dois antígenos disponíveis comercialmente, e de fixação de complemento foram comparadas (FC). Foram obtidos resultados de sensibilidade especificidade semelhantes para ambos os métodos de IDGA e ainda, a técnica de IDGA foi mais eficiente do que a da FC para o diagnóstico sorológico da infecção por B. ovis.


Subject(s)
Animals , Agar , Brucellosis/diagnosis , Immunodiffusion , Sheep , Complement Fixation Tests
6.
Pesqui. vet. bras ; 31(4): 336-344, abr. 2011. mapas, tab
Article in Portuguese | LILACS | ID: lil-584049

ABSTRACT

A presente atualização trata de duas das mais importantes doenças sexualmente transmitidas de bovinos, a campilobacteriose genital bovina e a tricomonose genital bovina. São abordados aspectos relacionados à epidemiologia destas doenças, principalmente em relação a sua distribuição no Brasil. Também são revisados aspectos importantes de diagnóstico, incluindo as técnicas e interpretação dos resultados, além de medidas de controle para ambas as doenças.


The present update deals with two of the most important sexually transmitted diseases of cattle: bovine genital campylobacteriosis and bovine genital trichomonosis. Epidemiological aspects, mainly their distribution in Brazil, alongside with their diagnosis in cattle are presented and commented. The main points in their diagnoses, including the description of the techniques and the interpretation of the results are also reviewed. Finally the control and prevention of both diseases are discussed.


Subject(s)
Animals , Sexually Transmitted Diseases/epidemiology , Sexually Transmitted Diseases/prevention & control , Sexually Transmitted Diseases/therapy , Sexually Transmitted Diseases/veterinary
7.
Arq. bras. med. vet. zootec ; 61(supl.1): 01-05, nov. 2009.
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1462586

ABSTRACT

As estratégias de combate à brucelose bovina são bastante conhecidas e, até o momento, os resultados são divergentes. No Brasil, o Ministério da Agricultura, Pecuária e Abastecimento (MAPA) implementou, em 2001, o Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose. Conhecer a situação epidemiológica da brucelose no início de um programa de controle permite: 1 - escolher as melhores estratégias de controle em função da frequência e padrão de distribuição da doença na população e 2 - acompanhar o programa com a finalidade de promover correções e evitar o desperdício de tempo e de recursos. Em razão disso, é necessário realizar estudos para dar suporte à escolha das melhores estratégias para os vários estados e regiões brasileiras e criar um mecanismo racional de verificação da efetividade das ações implementadas. Para tanto, o MAPA estabeleceu um Termo de Cooperação Técnica com a Faculdade de Medicina Veterinária da Universidade de São Paulo e envolveu também a Faculdade de Agronomia e Veterinária da Universidade de Brasília. Até o momento, foram concluídos os estudos de 15 unidades federativas, cujos resultados são apresentados nos artigos subsequentes. Além disso, há um 16º artigo que explora o impacto da vacinação de bezerras com a B19 na redução da prevalência da brucelose.


Although strategies for controlling and eradicating of bovine brucellosis are well known, the achievements vary widely. In 2001, the Brazilian Ministry of Agriculture, Livestock, and Food Supply (MAPA) started a new National Program for the Control and Eradication of Brucellosis and Tuberculosis (NPCEBT). In the beginning of a brucellosis control program, it is of utmost importance to gain insights into the epidemiological status of the disease in order to: (1) determine the sanitary measures according to the frequency and distribution patterns of the disease in the population; (2) monitor the development of the program and decide when to make adjustments, avoiding the waist of time and resources. As the epidemiological status of bovine brucellosis is not adequately known in Brazil, there was a case for undertaking cross-sectional studies targeted at identifying the best strategies for each state and region, as well as providing a basis for future appraisal of the NPCEBT. For this purpose, MAPA established a collaborative project with FMVZ-Universidade de São Paulo, which also included FAV-Universidade de Brasília. So far, 15 states completed the survey, whose results are described in the following papers. In addition, it is presented a paper that deals with modeling the impact of vaccination of heifers with strain 19 upon the reduction of brucellosis prevalence.


Subject(s)
Animals , Cattle , Brucella/isolation & purification , Brucellosis, Bovine/epidemiology , Brazil/epidemiology , Communicable Disease Control/methods
8.
Arq. bras. med. vet. zootec ; 61(supl.1): 1-5, nov. 2009.
Article in Portuguese | LILACS | ID: lil-536310

ABSTRACT

As estratégias de combate à brucelose bovina são bastante conhecidas e, até o momento, os resultados são divergentes. No Brasil, o Ministério da Agricultura, Pecuária e Abastecimento (MAPA) implementou, em 2001, o Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose. Conhecer a situação epidemiológica da brucelose no início de um programa de controle permite: 1 - escolher as melhores estratégias de controle em função da frequência e padrão de distribuição da doença na população e 2 - acompanhar o programa com a finalidade de promover correções e evitar o desperdício de tempo e de recursos. Em razão disso, é necessário realizar estudos para dar suporte à escolha das melhores estratégias para os vários estados e regiões brasileiras e criar um mecanismo racional de verificação da efetividade das ações implementadas. Para tanto, o MAPA estabeleceu um Termo de Cooperação Técnica com a Faculdade de Medicina Veterinária da Universidade de São Paulo e envolveu também a Faculdade de Agronomia e Veterinária da Universidade de Brasília. Até o momento, foram concluídos os estudos de 15 unidades federativas, cujos resultados são apresentados nos artigos subsequentes. Além disso, há um 16º artigo que explora o impacto da vacinação de bezerras com a B19 na redução da prevalência da brucelose.


Although strategies for controlling and eradicating of bovine brucellosis are well known, the achievements vary widely. In 2001, the Brazilian Ministry of Agriculture, Livestock, and Food Supply (MAPA) started a new National Program for the Control and Eradication of Brucellosis and Tuberculosis (NPCEBT). In the beginning of a brucellosis control program, it is of utmost importance to gain insights into the epidemiological status of the disease in order to: (1) determine the sanitary measures according to the frequency and distribution patterns of the disease in the population; (2) monitor the development of the program and decide when to make adjustments, avoiding the waist of time and resources. As the epidemiological status of bovine brucellosis is not adequately known in Brazil, there was a case for undertaking cross-sectional studies targeted at identifying the best strategies for each state and region, as well as providing a basis for future appraisal of the NPCEBT. For this purpose, MAPA established a collaborative project with FMVZ-Universidade de São Paulo, which also included FAV-Universidade de Brasília. So far, 15 states completed the survey, whose results are described in the following papers. In addition, it is presented a paper that deals with modeling the impact of vaccination of heifers with strain 19 upon the reduction of brucellosis prevalence.


Subject(s)
Animals , Cattle , Brucella/isolation & purification , Brucellosis, Bovine/epidemiology , Brazil/epidemiology , Communicable Disease Control/methods
9.
Arq. bras. med. vet. zootec ; 59(5): 1117-1123, out. 2007. ilus, tab
Article in Portuguese | LILACS | ID: lil-471191

ABSTRACT

Avaliou-se a freqüência dos genes de fímbrias (K88, K99, 987P, F18 e F41) e toxinas (LT, Stb, StaP e Stx2e) de cepas de E. coli isoladas de leitões com diarréia usando a técnica de PCR multiplex com primers específicos para esses genes, e estudou-se o padrão de sensibilidade das cepas patogênicas pelo método de difusão em disco ao florfenicol, ceftiofur sódico, colistina, fosfomicina, neomicina, norfloxacina, sulfa + trimetoprim, doxiciclina, tetraciclina e lincomicina. Foram utilizadas 144 amostras de E.coli isoladas de leitões com diarréia, provenientes de granjas localizadas no estado de Minas Gerais. Dessas, 42 (29,2 por cento) foram positivas para pelo menos um dos fatores de virulência testados. Dentre essas 42 amostras, 23 (54,8 por cento) apresentaram genes de fímbria e toxina, sete (16,6 por cento) apresentaram somente genes de toxinas e 12 (28,6 por cento) amostras somente genes de fímbria. O resultado do teste de sensibilidade aos antimicrobianos demonstrou que o florfenicol (89,5 por cento) e o ceftiofur sódico (84,2 por cento) foram as drogas de melhor eficácia in vitro sobre cepas de E. coli com fatores de virulência


The frequency of virulence determinants genes for fimbrial adhesions (K88, K99, 987P, F18 and F41) and toxins (LT, Stb, StaP and Stx2e) in E. coli strains isolated from diarrheic piglets using the multiplex polymerase chain reaction assay with specific primers for these genes was studied. The antimicrobial sensitivity pattern of pathogenic isolates for florfenicol, sodium ceftiofur, colistin, fosfomycin, neomycin, norfloxacin, sulfa + trimetoprim, doxycycline, tetracycline and lincomycin was also tested using the disk diffusion method. E. coli were isolated from 144 diarrheic piglets from farms in the state of Minas Gerais. Forty-two out of 144 studied samples (29.2 percent) were positive for at least one tested virulence factor. Out of these 42, 23 samples (54.8 percent) contained fimbria and toxin genes, seven (16.6 percent) samples had genes for toxins only and 12 (28.6 percent) samples just fimbria genes. Disk diffusion in vitro antimicrobial sensitivity test demonstrated the best results for florfenicol (89.5 percent) and sodium ceftiofur (84.2 percent) against virulent E. coli strains


Subject(s)
Animals , Diarrhea/veterinary , Escherichia coli/isolation & purification , Escherichia coli/pathogenicity , Escherichia coli/virology , Virulence Factors/isolation & purification , Polymerase Chain Reaction/methods , Sus scrofa/microbiology , Disk Diffusion Antimicrobial Tests/methods
10.
Braz. j. med. biol. res ; 38(9): 1383-1387, Sept. 2005. graf
Article in English | LILACS | ID: lil-408366

ABSTRACT

In contrast to most developed countries, most patients with primary hyperparathyroidism in Brazil are still symptomatic at diagnosis. However, we have been observing a change in this pattern, especially in the last few years. We evaluated 104 patients, 77 females and 27 males aged 11-79 years (mean: 54.4 years), diagnosed between 1985 and 2002 at a University Hospital. Diagnosis was made on the basis of clinical findings and of high total and/or ionized calcium levels, high or inappropriate levels of intact parathyroid hormone and of surgical findings in 80 patients. Patients were divided into three groups, i.e., patients diagnosed from 1985 to 1989, patients diagnosed from 1990 to 1994, and patients diagnosed from 1995 to 2002. The number of new cases diagnosed/year increased from 1.8/year in the first group to 6.0/year in the second group and 8.1/year in the third group. The first group comprised 9 patients (mean serum calcium ± SD, 13.6 ± 1.6 mg/dl), 8 of them (88.8 percent) defined as symptomatic. The second group comprised 30 patients (mean calcium ± SD, 12.2 ± 1.63 mg/dl), 22 of them defined as symptomatic (73.3 percent). The third group contained 65 patients (mean calcium 11.7 ± 1.1 mg/dl), 34 of them symptomatic (52.3 percent). Patients from the first group tended to be younger (mean ± SD, 43.0 ± 15 vs 55.1 ± 14.4 and 55.7 ± 17.3 years, respectively) and their mean serum calcium was significantly higher (P < 0.05). All of symptomatic patients independent of group had higher serum calcium levels (12.4 ± 1.53 mg/dl, N = 64) than asymptomatic patients (11.4 ± 1.0 mg/dl, N = 40). Our data showed an increase in the percentage of asymptomatic patients over the years in the number of primary hyperparathyroidism cases diagnosed. This finding may be due to an increased availability of diagnostic methods and/or to an increased awareness about the disease.


Subject(s)
Adolescent , Adult , Aged , Child , Female , Humans , Male , Middle Aged , Calcium/blood , Hyperparathyroidism, Primary/diagnosis , Parathyroid Hormone/blood , Analysis of Variance , Brazil , Hyperparathyroidism, Primary/blood , Hyperparathyroidism, Primary/surgery , Retrospective Studies , Time Factors
11.
Arq. bras. med. vet. zootec ; 56(5): 581-588, out. 2004. tab
Article in Portuguese | LILACS | ID: lil-392720

ABSTRACT

Foi adotado o tratamento intermitente da tuberculose com isoniazida em 240 bovinos de um rebanho naturalmente infectado pelo M. bovis. No início do tratamento 36,6 por cento dos animais foram reagentes positivos e 2,9 por cento inconclusivos. Todos os animais do rebanho receberam isoniazida por via oral em doses de 25mg/kg de peso vivo, administrada três vezes por semana, às segundas, quartas e sextas-feiras, durante 10 meses, perfazendo 120 doses. A cura de 98,9 por cento dos animais tratados foi verificada por meio da dessensibilização alérgica realizada pela tuberculinização e controle bacteriológico de 39 animais abatidos. O tratamento neste rebanho não resultou em seleção de cepas resistentes a isoniazida, comprovada pelo teste de sensibilidade a essa droga, realizado em cultura de M. bovis isolada de um animal não curado.


Subject(s)
Animals , Male , Female , Cattle , Isoniazid/therapeutic use , Mycobacterium bovis , Tuberculosis
12.
Braz. j. med. biol. res ; 37(9): 1379-1388, Sept. 2004. tab, graf
Article in English | LILACS | ID: lil-365225

ABSTRACT

The response to an oral calcium load test was assessed in 17 hypercalciuric nephrolithiasis patients who presented elevated parathyroid hormone (PTH) irrespective of the ionized calcium (sCa2+) levels. Blood samples were collected at baseline (0 min) and at 60 and 180 min after 1 g calcium load for serum PTH, total calcium, sCa2+, and 1.25(OH)2D3 determinations. According to the sCa2+ level at baseline, patients were classified as normocalcemic (N = 9) or hypercalcemic (N = 8). Six healthy subjects were also evaluated as controls. Bone mineral density was reduced in 14/17 patients. In the normocalcemic group, mean PTH levels at 0, 60 and 180 min (95 ± 76, 56 ± 40, 57 ± 45 pg/ml, respectively) did not differ from the hypercalcemic group (130 ± 75, 68 ± 35, 80 ± 33 pg/ml) but were significantly higher compared to healthy subjects despite a similar elevation in sCa2+ after 60 and 180 min vs baseline in all 3 groups. Mean total calcium and 1.25(OH)2D3 were similar in the 3 groups. Additionally, we observed that 5 of 9 normocalcemic patients presented a significantly higher concentration-time curve for serum PTH (AUC0',60',180') than the other 4 patients and the healthy subjects, suggesting a primary parathyroid dysfunction. These data suggest that the individual response to an oral calcium load test may be a valuable dynamic tool to disclose a subtle primary hyperparathyroidism in patients with high PTH and fluctuating sCa2+ levels, avoiding repeated measurements of both parameters.


Subject(s)
Humans , Male , Female , Calcium , Hypercalcemia , Hyperparathyroidism , Kidney Calculi , Parathyroid Hormone , Bone Density , Sensitivity and Specificity , Time Factors
13.
Arq. bras. med. vet. zootec ; 56(4): 425-432, ago. 2004. tab
Article in English | LILACS | ID: lil-386706

ABSTRACT

Produziu-se uma bacterina de Escherichia coli enterotoxigênica (ETEC) contendo as fímbrias K99 e F41 e avaliaram-se a capacidade de indução de anticorpos anti-K99 e anti F-41 no colostro de vacas vacinadas e no soro de bezerros e a persistência dos anticorpos nos neonatos. Três experimentos foram realizados em duas fazendas comerciais. Os animais foram aleatoriamente alocados em blocos, de duas fêmeas prenhes (uma vacinada e outra controle) e seus respectivos bezerros. No experimento A (fazenda 1), com 18 blocos, os animais receberam uma dose da vacina, 30 dias antes do parto. No experimento B (fazenda 1), com 26 blocos, os animais receberam duas doses de vacina, aos 60 e 30 dias antes do parto. No experimento C (fazenda 2), com 22 blocos, os animais receberam o mesmo esquema de vacinação do experimento B. Nos experimentos A e B foram coletados colostro das parturientes e soro dos bezerros entre 24 e 36 horas de vida. No experimento C, foram usadas novilhas receptoras de embriões e coletados colostro e soro dos bezerros aos 7, 14, 28 e 42 dias de idade. Anticorpos anti-K99 e anti-F41 foram detectados por ELISA utilizando antígenos K99 e F41 purificados. No experimento A não foi observada diferença entre o grupo vacinado e o controle quanto à detecção de anticorpos. No experimento B foi observada diferença (P<0,001) entre o colostro de fêmeas vacinadas e o soro de seus bezerros. No C houve diferença entre o grupo vacinado e o controle para o colostro e o soro dos bezerros aos 7, 14, 28 (P<0,001) e 42 dias de idade (P= 0,003). A bacterina utilizada foi eficiente para a indução de resposta imune humoral detectável.


Subject(s)
Animals , Male , Female , Cattle , Diarrhea , Escherichia coli , Immunization, Passive , Antibodies , Enzyme-Linked Immunosorbent Assay
14.
Arq. bras. med. vet. zootec ; 55(6): 766-769, dez. 2003. tab
Article in Portuguese | LILACS | ID: lil-359834

ABSTRACT

The frequency of bovine genital campylobacteriosis (BGC) in 157 cows from nine herds from the microregion of Varginha - Minas Gerais - Brazil was evaluated. Farmers use either artificial insemination and natural breeding after two insemination procedures or natural breeding. The diagnosis of BGC was performed by the direct fluorescent antibody test (DFAT) using vaginal mucus. All studied herds showed C. fetus infected animals and, of 157 animals, 40 (25.5 percent) were positive in DFAT: 7 (26.9 percent) from herds with natural breeding and 33 (25.1 percent) from herds with both artificial insemination and natural breeding after the second-to-third insemination. The high frequency of BGC found in this study shows that this disease is present among herds which have reproductive problems and the use of natural breeding after the second-to-third unsuccessful insemination could be a risk factor for the disease


Subject(s)
Animals , Female , Campylobacter fetus , Epidemiology , Insemination, Artificial
15.
Arq. bras. med. vet. zootec ; 54(4): 441-443, jul.-ago. 2002.
Article in Portuguese | LILACS | ID: lil-328422

ABSTRACT

A comparative tuberculinization test was performed in 1303 animals from seven farms and 266 showed positive to the test. Mycobacterium bovis was isolated from a pool of lymphatic nodes from 14 reagents animals using Stonebrink media and confirmed by biochemical tests


Subject(s)
Animals , Buffaloes , Carnivora , Neospora , Serology
16.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1462561

ABSTRACT

This report describes the isolation of Mycobacterium bovis from a dog with a history of co-habitation with bufallos infected with Mycobacterium bovis. After necropsy, the microrganism was isolated from a mesenteric lymphatic node in Stonebrink media and bacterial identification was confirmed by biochemical tests.

17.
Arq. bras. med. vet. zootec ; 53(4): 410-412, ago. 2001.
Article in Portuguese | LILACS | ID: lil-307711

ABSTRACT

This report describes the isolation of Mycobacterium bovis from a dog with a history of co-habitation with bufallos infected with Mycobacterium bovis. After necropsy, the microrganism was isolated from a mesenteric lymphatic node in Stonebrink media and bacterial identification was confirmed by biochemical tests


Subject(s)
Animals , Male , Female , Mycobacterium bovis , Tuberculosis , Dogs
18.
Arq. bras. med. vet. zootec ; 52(6): 662-8, dez. 2000. ilus, tab
Article in English | LILACS | ID: lil-283479

ABSTRACT

The high pressure liquid chromatography (HPLC) was used for the identification of isoniazid (isonicotinic acid hydrazide) in the milk of cattle treated with a dose of 25 mg/kg/day in alternated days. The effect of milk pasteurization on the isoniazid residue concentration was also studied. The drug excretion presented a cyclic variation, with higher levels in the first day after administration (aa), a mean of 1104.48µg/l, and a decrease two days aa, with a mean of 104.12µg/l. Four days after the last administration of the drug it was not possible to identify residues of isoniazid in the milk of treated animals. Body weight and milk yield influenced the amount of the excreted drug, and pasteurization decreased (mean 47.07 per cent) the concentration of isoniazid residue in milk


Subject(s)
Animals , Female , Isoniazid/administration & dosage , Milk , Tuberculosis, Bovine , Cattle , Chromatography, High Pressure Liquid
19.
Arq. bras. med. vet. zootec ; 45(4): 353-9, ago. 1993.
Article in English | LILACS | ID: lil-240137

ABSTRACT

Foram estudadas 165 amostras de Escherichia coli isoladas de 41 bezerros provenientes de 11 rebanhos leiteiros do Estado de Minas Gerais. Sete amostras produziram toxina termoestável. Destas, duas aglutinaram hemácias de cavalo na presença de manose e foram sorologicamente positivas para K99 (FS), uma apresentou aglutinaçäo de hemácias de cavalo e sorologia negativa para K99 (FS) e duas näo aglutinaram hemácias de cavalo e foram sorologicamente positivas para K99 (FS). Vinte e cinco amostras, isoladas de 18 bezerros com idade entre sete e 51 dias, foram produtoras de citotoxinas. Estes resultados indicam maior importância das amostras citotoxigênicas de E. coli sobre as enterotoxigênicas, no Estado de Minas Gerais


Subject(s)
Animals , Cattle , Cytotoxins , Diarrhea , Escherichia coli
20.
Interferón biotecnol ; 6(3): 265-71, sept.-dic. 1989. tab
Article in Spanish | LILACS | ID: lil-93471

ABSTRACT

El factor de crecimiento epidérmico (EGF) y su receptor (EGF-R) son de gran interés actualmente por su rol en la tumorigénesis, pues se ha demostrado la presencia de altos niveles de receptores de EGF en algunos tumores humanos y en nódulos metastásicos, así como que su expresión es índice de mal pronóstico. En este trabajo se estudia la biodistribución del 131I-EGF por inyección subcutánea en ratones normales, obteniéndose que el EGF circuló rapidamente y se acumuló en hígado, piel, riñón y glándula submaxilar fundamentalmente, con un tiempo de vida media de aproximadamente una hora, siendo eliminado por la orina. La acumulación del EGF fue dependiente de su habilidad para reconocer a los receptores específicos. En ratones portadores de tumores, la biodistribución se comporta dependiendo de la expresión de los receptores del EGF en el tumor


Subject(s)
Mice , Animals , Carcinoma , Epidermal Growth Factor , Iodine Radioisotopes , Neoplasm Transplantation , Neoplasms, Experimental
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