Abstract:One hundred and thirty eight rams were allocated to four experimental groups. An inactivated Br. ovis vaccine was administered either once by the intraperitoneal route (1 i/p), twice by the intraperitoneal route (2 i/p), or twice by the subcutaneous route (2 s/c), and the last group was left unvaccinated. They were then challenged by the intravenous inoculation of between 123 and 1.23 x 108 live Br. ovis bacteria. The number of rams that succumbed to infection within the four groups was 4135 (11%) for the 2 s/… Show more
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