[ID 135] BOVINE ENZOOTIC LEUKOSIS: disease of evolution quiet in dairy herds

João Lúcio Alves, Francielle Aparecida de Sousa, Gustavo Lima Ribeiro

Abstract

INTRODUCTION: Dairy herds are affected by viral diseases such as enzootic bovine leukosis (LEB). It is an infectious contagious disease that spreads in the lymph nodes, spleen, uterus and also in the kidneys, manifesting tumor signs.

OBJECTIVE: To report a supposed case of LEB through a clinical examination, carried out in a rural property near the city of Monte Carmelo/MG.

METHODS: Bovine, female, Dutch breed, approximately 06 years old, average of 450 kg, evaluated for 10 days. Aiming at a more accurate diagnosis, clinical examination of the animal was carried out, and complementary exams such as rectal palpation, sensitivity test, evaluation of submandibular, pre-scapular and inguinal lymph nodes.

RESULTS: In the sensitivity test, there were reflexes in the forelimbs and paresis in the hind limbs. On rectal palpation, a rigid mass was found in front of the uterus, measuring approximately 20x15 cm. Another apparent symptom was exophthalmos in the right eyeball. And, in addition, during the evaluation of the submandibular, pre-scapular and inguinal lymph nodes, all were reactive, being supposedly diagnosed as LEB. Due to the lack of confirmation with histopathological exams, it was not possible to determine the diagnosis, so supportive treatment, based on vitamin B1 and corticosteroids, was suggested. After four days, the animal died and a necropsy was performed. From the autopsy results and searches in the literature, it was possible to determine the supposed diagnosis of LEB.

CONCLUSION: By supposed diagnosis, it was possible to correlate the issues of low fertility and low milk production, as they are reflections of this disease.