Avaliação dos macrófagos espumosos hepáticos e do peso de carcaça quente de bovinos criados extensivamente no pasto de Brachiaria spp
Nenhuma Miniatura disponível
Data
2016-09-30
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The Brachiaria grass, with broad geographic distribution in Brazil, has been shown to cause
photosensitization and appearance of foamy macrophages in the liver and liver and mesenteric
lymph nodes of ruminants. Weight loss of 2.52% in cattle with subclinical hepatogenous
photosensitization was documented and it is estimated that in one year in a single
slaughterhouse more than R$ 100,000 in annual losses are caused by liver damage resulting
from consumption of Brachiaria spp. The aim of this study was to corelate the extent of liver
parenchyma containing foamy macrophages with hot carcass weight of cattle. Carcasses of
cattle aged 20-36 months were weighed and divided into two groups: Group 1 (544.87-607.13
pounds) and Group 2 (689.42-757.24 pounds) The livers of bovines were weighed and
samples of the right lobe were collected for histopathologic analysis. The areas of hepatic
parenchyma containing foamy macrophages were measured using the ImageJ® program.
Statistical analysis of the parameters (liver weight, hot carcass weights and affected area of
liver tissue) was performed quantitatively, by calculating the mean, standard deviation and
coefficient of variation. These data were analyzed for normality and homogeneity of
variances, through the Kolmogorov-Smirnov and Bartlett tests. As the variables were
homogeneous and had a normal distribution were evaluated by parametric test analysis of
variance. The correlation of variables was performed by Spearman test. The significance level
was set at 5% and all descriptive analyzes were performed by EXCEL program and statistical
tests by the software R. Cattle grazing Brachiaria spp. presented hepatic lesions characterized
by degeneration, necrosis, presence of mild inflammatory infiltrates and small area of hepatic
tissue containing foamy macrophages. There was no influence of the affected area of the
hepatic parenchyma containing foamy macrophages with hot carcass weight of cattle.
Descrição
Palavras-chave
Citação
GONZAGA, B. C. F. Avaliação dos macrófagos espumosos hepáticos e do peso de carcaça quente de bovinos criados extensivamente no pasto de Brachiaria spp. 2016. 38 f. Dissertação (Mestrado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2016.