Situação da tuberculose em ovinos criados consorciados com bovinos leiteiros na região sudoeste maranhense

Abstract

The aim of this study was to know the situation of the ovine tuberculosis in Maranhão, verifying the occurrence of the disease in the herd, identifying reagents to the tuberculin test. We evaluated 343 sheep, of both sexes, aged over six months, from the south region of the state through the comparative cervical test, by inoculation of tuberculin in the right cervical region cranial was injected with the avian PPD and the caudal PPB beef in individual doses of 0.1 mL of each tuberculin. In assessing the results, all animals were negative for tuberculosis. The sample consisted of 247 (72.01%) females and 96 (27.99%) males. Of the total, 65 sheep had higher than the avian reaction to bovine tuberculin, with no significant increase for positive testing; and 278 sheep had lower avian reaction to bovine tuberculin. There was no reaction to avian tuberculin in 254 (74.64%) animals and bovine tuberculin in 338 (98.54%). To investigate the possibility of animals with advanced tuberculosis, with decrease in anergy or allergic sensitization, was necropsied one cachectic sheep, above the age of four years, with negative results for tuberculosis by TCC, which showed reaction at the application site of avian tuberculin and lymph nodes augmented with hardened, suggesting consistency of Caseous Lymphadenitis, for sampling and conducting histopathology, culture and isolation. The results suggest C. pseudotuberculosis infections, Actinomyces pyogenes; Staphylococcus aureus and Mycobacterium sp. The culture and isolation resulted in Pseudomonas aeruginosa and Bacillus sp. Not compatible with AFB bacterial structures were visualized. The results confirm the absence of reactor animals to M. bovis, assuming the absence of tuberculosis in sheep in the study area.