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Foi realizado um estudo retrospectivo dos registros histopatologicos de casos de tuberculose bovina do Laboratorio de Patologia Veterinaria da Universidade Federal de Goias, Campus Jatai (LPV/UFG/Campus Jatai) no periodo de julho/2010 a junho/2013. As amostras foram processadas para histologia e coradas por Hematoxilina e Eosina. No periodo, foram examinadas 27 amostras, de porcoes do pulmao e de linfonodos regionais de bovinos. A suspeita macroscopica de granuloma tuberculoide foi constatada em 10 (37%) casos. No exame histopatologico, seis amostras (6/10) tiveram diagnostico compativel com tuberculose, mas apenas um (1/6) foi confirmado por Reacao em Cadeia de Polimerase. As demais amostras foram diagnosticadas como leucose enzootica bovina (2/10), carcinoma de celulas escamosas pulmonar (1/10) e granulomas actinomicoticos (1/10). As amostras compativeis com tuberculose eram originarias de Jatai e Mineiros, localizados na Regiao Sudoeste de Goias, todas provenientes de um mesmo frigorifico da regiao. As amostras eram de bovinos machos, com idade entre 25-132 meses, de diferentes racas e de varios periodos do ano. Os Medicos Veterinarios da inspecao relataram observar linfadenite generalizada na carcaca, evidenciada pelo aumento de volume, aspecto firme, por vezes, com conteudo purulento e “grânulos”, alem disso, no pulmao havia nodulos amarelados bem delimitados, com focos de aspecto caseoso ou calcificados (rangiam ao corte). Microscopicamente, as lesoes consistiram em areas focalmente extensas adjacentes ao parenquima pulmonar de necrose de caseificacao central envolvidas por infiltrado inflamatorio acentuado de linfocitos, plasmocitos, neutrofilos, macrofagos epitelioides e celulas gigantes multinucleadas tipo Langhans e/ou corpo estranho e, por vezes, grânulos basofilicos granulares (mineralizacao) nas areas necroticas. Esses achados sao compativeis com tuberculose, porem, e essencial a cultura e isolamento da bacteria e/ou a identificacao de bacilos alcool-acido resistentes em cortes histologicos para confirmacao da enfermidade. Assim, pode-se confirmar a importância do estudo epidemiologico e controle sanitario da tuberculose bovina em frigorificos e rebanhos da regiao Sudoeste de Goias. SUMMARY Histopathological records of bovine tuberculosis cases from the Laboratory of Veterinary Pathology, Federal University of Goias, in Jatai (LPV, UFG, Jatai) from July/2010 to June/2013 were analyzed. The samples were processed for histology and stained with hematoxylin and eosin. During the period, 27 samples of the lung and regional lymph nodes of cattle were examined. Macroscopically, tuberculous granuloma was suspected in 10 samples (37%). Upon histopathological examination, six samples (6/10) had a diagnosis compatible with tuberculosis, but only one (1/6) was confirmed by the Polymerase Chain Reaction. The remaining samples were diagnosed as enzootic bovine leukemia (2/10), squamous cell carcinoma of the lung (1/10) and actinomycotic granulomas (1/10). The samples compatible with tuberculosis had originated in Jatai and Mineiros, in Southwestern Goias. They were all from the same slaughterhouse and processing unit. The samples were from male animals aged between 25 and 132 months, of different breeds and periods of the year. The veterinarians responsible for meat inspection reported generalized lymphadenitis in the carcass, as evidenced by the increased volume, firm appearance, sometimes containing pus and "granules", in addition to the presence of well-defined yellow nodules in the lung, with caseous or calcified foci (creaked upon shearing). Histologically, the lesions consisted of focally extensive areas adjacent to the lung parenchyma of central caseous necrosis surrounded by inflammatory infiltrate with remarkable lymphocytes, plasma cells, neutrophils, epithelioid macrophages, and Langhan giant cells and/or foreign body and, sometimes, basophilic granules granular (mineralization) in necrotic areas. These findings are consistent with tuberculosis; however, it is essential to culture and isolate the bacteria and/or identify the acid-alcohol resistant bacilli in histological samples in order to confirm the disease. Thus, we can confirm the importance of epidemiological and sanitary control of bovine tuberculosis in the herds and slaughterhouses in southwestern Goias.

ars veterinária

ASPECTOS EPIDEMIOLÓGICOS E PATOLÓGICOS DA TUBERCULOSE BOVINA NA REGIÃO SUDOESTE DE GOIÁS / EPIDEMIOLOGIC AND PATHOLOGICAL ASPECTS OF BOVINE TUBERCULOSIS IN SOUTHWESTERN GOIÁS, BRAZIL