Toxigenic type D Pasteurella multocida and progressive atrophic rhinitis in New South Wales pig herds

Toxigenic type D P. multocida was first detected in New South Wales in 1986. A survey in 1987 indicated that 2% of herds with more than 20 sows were infected. In 44 randomly selected herds, examined between July 1988 and February 1989, the prevalence of infection was 4.5%. In all examined herds, the introduction of pigs from an infected herd in South Australia was associated with an increased risk of infection. Isolates were generally sensitive to penicillin, ampicillin, tetracyclines, nitrofurazone and trimethoprim/sulfamethoxazole.