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Pasteurella anatipestifer infection in turkeys.

In a case of excessive mortality in seven-week-old turkeys, the primary lesion at necropsy was severe fibrinous pericarditis and epicarditis. After 48 hours of incubation at 37 C, Pasteurella anatipestifer was isolated. The infection responded to antibiotic therapy with a combination of neomycin and oxytetracycline in the drinking water. The lesions suggested chlamydial infection, but cultural procedures for chlamydia were negative.

Animals↗
PubMed2002

Otitis interna as a result of Pasteurella multocida infection in a laboratory woodchuck.

A laboratory woodchuck presented clinically with left-sided torticollis and a purulent exudate within the external auditory meatus of the left ear. Bacterial culture of the exudate resulted in a heavy growth of Pasteurella multocida. Treatment was initiated with topical and systemic antimicrobial compounds. There was no clinical improvement after 72 h of treatment, and euthanasia was elected. Radiographs correlated well with necropsy findings, confirming a diagnosis of otitis media; otitis interna was not confirmed but was suggested by the clinical presentation. To the authors knowledge, this is the first description of otitis media/interna as a result of P. multocida infection in a laboratory woodchuck.

Animals↗
PubMed1978

Fever and survival in rabbits infected with Pasteurella multocida.

1. Fever and survival rate of New Zealand white rabbits, injected with two doses of live Pasteurella multocida, were compared to determine if the relation between fever and survival observed in reptiles is also seen in a mammal. Since it is known that fever is beneficial in infected reptiles, our experiments were viewed as an initial step in the investigation of a similar potentially beneficial effect in mammals.2. There was a statistically significant correlation between the fever magnitude and survival. As fever increased up to 2.25 degrees C, the survival rate increased. Fevers above this level were associated with a decreased survival rate.3. Antipyretic drugs were administered to half the rabbits. The drugs were ineffective in reducing the fevers produced by injections of large doses of bacteria. Rabbits infused with antipyretics had a decreased mortality rate. The decreased mortality rate may be due to some action of the drugs other than their antipyretic effect.4. In vitro growth of P. multocida at normal (39 degrees C) and febrile (42 degrees C) temperatures was not significantly different. This suggests that the increased survival rate associated with higher fevers was not due to a direct inhibition of the growth of the bacteria by the increased temperature. It may be due to an enhancement of some aspect of the rabbits' immunological defences.5. It remains to be determined whether fever causes a higher survival rate or whether fever is only correlated with survival rate.

Animals↗
PubMed1978

Serological tests as indicators of immunity against Pasteurella multocida infection in sheep.

Five serological tests, i.e. single tube agglutination, doubling dilution tube agglutination, agar agglutination, passive hemagglutination and passive mouse protection tests were evaluated for their efficacy in predicting the fate of vaccinated and unvaccinated sheep on challenge with an ovine strain of Pasteurella multocida. The passive hemagglutination test predicted the fate of unvaccinated sheep while the agar agglutination test indicated the immune status of vaccinated sheep.

Agglutination Tests↗
PubMed1990

The effect of stress on host defense system and on lung damage in calves experimentally infected with Pasteurella haemolytica type A1.

This paper describes the influence of stress, immediately before a massive inoculation of a log-phase P. haemolytica A1 culture in brain-heart-infusion broth by fiberoptic bronchoscopy in 5 months old conventional calves. Differences in phagocytic cell function and numbers, lung function and lung tissue damage between stressed and non-stressed, infected calves were studied. Compared with the non-stressed calves before infection, the superoxide generation by blood polymorphonuclear leucocytes of the stressed animals was markedly reduced immediately after a 2 hours stress period, but it recovered within 3 days. The total numbers of phagocytic cells, harvested from lung lavage fluid 3 days after inoculation were twice as high in the non-stressed calves than in the stressed calves. In contrast, no differences in pulmonary lesions and functions were found between stressed or non-stressed calves. The role of several stress factors on infiltration and metabolic response of polymorphonuclear leucocytes in P. haemolytica infections and the effects of bacterial endotoxin and leukotoxin on alveolar and vascular injury are discussed.

Animals↗
PubMed1993

An occurrence of equine transport pneumonia caused by mixed infection with Pasteurella caballi, Streptococcus suis and Streptococcus zooepidemicus.

An acute death occurred in a racehorse with pneumonia after long-distance transportation in December, 1990. Pasteurella caballi, Streptococcus suis and Streptococcus zooepidemicus were isolated from the lung at high rate. Specific antigens of these bacteria were also demonstrated immunohistologically in the pneumonic lesion. These findings indicated that the disease is equine transport pneumonia caused by a mixed infection of the three bacterial species. This is the first report on the isolation of P. caballi and S. suis from a racehorse in Japan.

Animals↗