Achados histopatológicos em linfonodos pulmonares de bovinos destinados ao abate em matadouros nas regiões do Brejo e Curimataú paraibano

Abstract

The histopathological examination can be performed in a complementary way to the macroscopic findings to confirm pathologies during the inspection of carcasses in refrigerators. The objective of this study is to determine the histopathological changes and general conditions of the animals slaughtered in the slaughterhouses of the Brejo and Curimataú Paraibano microregions, analyzing samples of lung lymph nodes from cattle slaughtered in the cities of Arara and Solânea and that have their meat destined for human consumption in the region. A total of 56 samples of different bovines were collected at periodic visits, followed by the slaughter of these animals, the moment of evisceration, four lymph nodes were collected from each carcass and sent to the Veterinary Histopathology Laboratory of the Veterinary Hospital. Such lymph nodes had their macroscopic and microscopic aspects evaluated. In the macroscopic evaluation it was observed that the lymph nodes had different sizes with a mean of 2.67 (± 2.12) cm in length, 1.40 (± 0.76) cm in width and 1.07 (± 0.66) cm of thickness. Macroscopically, the lymph nodes were whitish, shiny and without cut resistance, but some showed only alteration in the color of the cortical and medullary. In the histological evaluation there were significant alterations such as follicles, congestion, coalescing follicles, disordered follicles, hemorrhage, islets of lymphocytes, hemosiderin, follicular hyperplasia, inflammatory infiltrate, lymphocytic, macrophagic and plasmacytic infiltrate, loss of lymphatic structure and pleomorphism follicular. The meat consumption of these animals may present a zoonotic risk, the histopathological findings observed may be present in several pathologies, to identify them it is necessary to correlate with the macroscopic findings during inspection.