Resultado da pesquisa (32)
Termo utilizado na pesquisa Sem termos de indexação
#1 - Determination of the causative agent of periparturient period interdigital dermatitis that adversely affects reproduction and milk production in cows by MALDI-TOF
Abstract in English:
In recent years, problems associated with high milk yield in dairy cows have increased considerably. Today, interdigital dermatitis (ID) is one of the most significant problems across the dairy industry, threatening animal health and welfare and inducing serious productivity losses. The etiology and mechanism of damage caused by this disease, which disrupts quality of life, milk yield, and reproduction, have not yet been fully understood. In order to achieve the study objectives, 40 biparous cows (3 years old – second calving) that had lameness associated with ID from prepartum day 30 to postpartum day 60 (Study group) and 40 biparous cows (3 years old) without lameness symptoms during the specified period (Control group) constituted the material of the present study. There was no difference in the levels of non-esterified fatty acids in the blood samples collected from those animals during the dry period (45-60 days before parturition; P=0.38). There were differences between the groups in certain parameters, including beta-hydroxybutyric acid level in the postpartum period, weight loss in the first month, number of ovarian cysts in the first 60 days, milk production in the first month, and the first corpus luteum determination process. (P<0.001) There was no difference between the groups in terms of reproductive parameters (mode of delivery, litter viability, litter weight, litter weight, expulsion of membranes, etc.) and presence of infection (acute puerperal metritis) during birth (P>0.05 for all parameters). In addition to all of the above, Wohlfahrtiimonas chitiniclastica bacteria were isolated for the first time in microbiological samples collected from ID, which is a significant condition for dairy cows during the periparturient stage, contributing to the etiology of the disease, which has not been understood so far.
Abstract in Portuguese:
SEM RESUMO
#3 - Importância do exame clínico para o diagnóstico das enfermidades do sistema nervoso em ruminantes e eqüídeos, 22(4):161-168
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#4 - Intoxicações por plantas em ruminantes no Brasil e no Uruguai: importância econômica, controle e riscos para a saúde pública, 21(1):38-42
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#5 - Deficiências minerais em animais de fazenda, principalmente bovinos em regime de campo, 20(3):127-138
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#6 - A importância da necropsia em medicina veterinária, 18(3/4):132-134
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#7 - Raiva bovina e linhas de conduta (Tópico de Interesse Geral), 18(1):45-46
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#8 - Equine motor neuron disease
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#9 - "Cara inchada" dos bovinos e deficiências minerais
Abstract in English:
NO ABSTRACT
Abstract in Portuguese:
SEM RESUMO
#10 - Enzymatic and endotoxic activities of bacteria isolated from periodontal lesions of calves with "Cara inchada"
Abstract in English:
Bacteria isolated from periodontal lesions of calves with "cara inchada" were examined for enzymatic and endotoxic activities. Black-pigmented cultures of Bacteroides produced deoxiribonuclease, collagenease, chondroitin sulfatase, fibrinolysin, gelatinase, hyaluronidase, lipase and protease. Trypsin-like proteolytic activities were demonstrated in cultures of black-pigmented asaccharolytic Bacteroides that were also high producer of collagenase. Actinomyces israelii, A. pyogenes and Fusobacterium nucleatum showed weak production of hydrolytic enzymes. Biological activities of lipopolysaccharides extracted from Bacteroides melaninogenicus, Bacteroides spp. and F. nucleatum were examined by the ability to produce a Shwarzman-reaction in rabbits. Endotoxic lipopolysaccharides from F. nucleatum had higher biological activities than those from Bacteroides. These findings suggest a possible role of the bacterial enzymes and endotoxins in the development of periodontal lesions in young cattle.
Abstract in Portuguese:
Estudos foram realizados para determinar as atividades enzimáticas e endotóxicas de bactérias isoladas de lesões peridentárias de bezerros com "cara inchada". Amostras "pigmentadas" de Bacteroides hidrolisaram o maior número de substratos, produzindo desoxiribonuclease, colagenase, sulfato de condroitinase, fibrinolisina, gelatinase, hialuronidase, lipase e protease. Atividade proteolítica semelhante à da tripsina foi observada nas amostras assacarolíticas de Bacteroides, que foram também mais ativas na produção de colagenase. Actinomyces israelii, Actinomyces pyogenes e Fusobacterium nucleatum foram pouco ativos na produção de enzimas hidrolíticas. Atividade biológica de lipopolissacarídeos extraídos de Bacteroides spp., B. melaninogenicus e F. nucleatum foi testada pela capacidade de produção da reação dérmica de Shwarzman em coelhos. Endotoxina de F. nucleatum foi mais ativa, quando comparada com a de Bacteroides. Os resultados sugerem uma possível participação de enzimas e endotoxinas bacterianas no desenvolvimento das lesões peridentárias da "cara inchada'' dos bovinos.
