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Examination of 2286 serum samples from 1681 cattle in 10 dairy herds and 3 AI centres in four States gave an over-all positive reactor rate of 25% to indirect immunofluorescence (the most sensitive test). Reactor rates were higher among the 154 male animals (32.5%) than among the 1527 females...

Pituco, E. M.
Universidade de Sao Paulo,
Ocorrência da rinotraqueíte infecciosa dos bovinos/vulvovaginite pustular infecciosa (IBR/IPV) em rebanhos bovinos criados nos Estados de São Paulo, Rio Grande do Sul, Paraná e Minas Gerais., 1988, pp 77 pp.