Resumo

RODRIGUEZ FIERROS, Félix Leao et al. Practical use of clinical cytology for the diagnosis of hepatic lipidosis in dairy cattle. Veterinaria México OA [online]. 2018, vol.5, n.1, pp.8-21. ISSN 2448-6760.  https://doi.org/10.21753/vmoa.5.1.386.

Hepatic lipidosis is a metabolic disorder that occurs frequently in dairy cattle. Its clinical evaluation on dairy farms is complex, as it is based on physical, chemical and biological tests. The present study evaluates the practical use of hepatic cytology in dairy cattle and suggests that overall health and dairy production rates of animals are not compromised with this procedure. Cell and blood samples were obtained from 25 randomly selected multiparous Holstein dairy cows at three different times during the transition period (at calving and at 10 and 21 days postpartum). The values of haematocrit, plasma protein, fibrinogen, and total and differential leucocyte counts were determined, together with total protein, albumin, glutamate dehydrogenase, triacylglycerides, cholesterol and ß-hydroxybutyrate. Cytological results were classified by the detected degree of fatty infiltration, and haematological and metabolic results were compared between each sampled period. The health status and the daily milk production at each sampling stage were recorded. Obtained results indicated that the animals did not show significant clinical inflammation or a decrease in dairy production, which could be deemed secondary to the cytological sampling. This technique is thus regarded as a feasible alternative for the diagnosis of hepatic lipidosis in dairy cattle.

Palavras-chave : Lipidosis; cytology; dairy cow; fatty infiltration.