Outbreaks of pleuritis and peritonitis in calves associated with Pasteurella multocida capsular type B strain
| Autor: | A. M. J. McFadden, R. P. Spence, Henrik Christensen, F I Hill, S E Keeling, R A Fairley, J M Gill |
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| Rok vydání: | 2011 |
| Předmět: |
Male
Pasteurella multocida animal diseases Pasteurella Infections Cattle Diseases Peritonitis Biology Disease Outbreaks Microbiology law.invention Pericarditis law medicine Animals Typing Animal Husbandry Pleurisy General Veterinary Respiratory distress Outbreak General Medicine medicine.disease biology.organism_classification Gram staining Multilocus sequence typing Cattle Female New Zealand |
| Zdroj: | New Zealand Veterinary Journal. 59:40-45 |
| ISSN: | 1176-0710 0048-0169 |
| DOI: | 10.1080/00480169.2011.547168 |
| Popis: | Three dairy calf-rearing properties experienced high mortality in calves during 2008 and 2009. Affected calves were aged 13-18 weeks (Farm I), 6 months (Farm II), and 2-11 weeks (Farm III), and the mortality rate was 22/175 (13%), 5/80 (6%), and 60/900 (7%), respectively.Affected calves rapidly became moribund, were in respiratory distress, and had a fever (40-41°C). Post-mortem examination of nine calves revealed fibrinopurulent pleuritis, pericarditis, and peritonitis. This was confirmed histopathologically on tissues from three calves, one from each farm; aggregates of small Gram-negative coccobacilli were evident on Gram stain. Pasteurella multocida was cultured from tissues from affected calves on the three farms, and PCR of DNA extracted from tissue samples amplified cap-sular type B-specific DNA. Multi-locus sequence typing (MLST) demonstrated that all capsular type B isolates belonged to the same sequence type (ST), ST62, but did not belong to serotype B:2, the only B serotype classified as causing haemorrhagic septicaemia by the Office International des Epizooties (OIE).Pleuritis and peritonitis due to infection with P. multocida capsular type B strain.Haemorrhagic septicaemia was excluded as a cause of disease from the three farms, however P. multocida was the primary agent in the affected calves. It is possible the agent has been present in New Zealand for some time but not reported, as there had been no transfer of animals between affected farms. Emergence of the syndrome could potentially be a result of factors other than just the presence of the organism, such as changing management. The syndrome described may be of increasing importance in the future. |
| Databáze: | OpenAIRE |
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