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Of 301 serum samples collected from goats in 5 areas of the State in 1990-91, 75 (25%) were positive to the passive haemagglutination test using strain IBR-LA as antigen. Other workers have reported positive reactor rates of 34% and 53% among the cattle in Bahia State.

Cardos, S. M. da S.; Anunciação, A. V. M.; Fuigueiredo, A.
Arquivos da Escola de Medicina Veterinária da Universidade Federal de Bahia, 1991, 14, 1, pp 150-163