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miércoles, 19 de septiembre de 2018

Bacillus anthracis as a cause of bovine abortion - a necropsy case requiring special biosafety measures

In spring 2017, the first case of bovine anthrax in 20 years in Switzerland occurred in the canton of Jura. Carcasses of anthrax-deceased animals should not be opened due to the formation of highly resistant spores bearing the risk of environmental contamination and aerosolization. Nevertheless, in the course of this local outbreak, one sick cow from the affected farm, whose blood repeatedly tested negative for Bacillus anthracis, was necropsied after euthanasia under special biosafety precautions at the Institute of Animal Pathology, Vetsuisse-Faculty Bern. Necropsy revealed ventral edema, fetal death, necro-hemorrhagic placentitis and necrotizing iliac lymphadenitis. Bacillus anthracis was isolated only from placenta and altered lymph node. The biosafety measures taken during and after necropsy prevented a contamination of the necropsy environment, which was proven with bacteriological swabs. This case shows that anthrax may elicit unspecific symptoms mimicking other diseases, and veterinarians must be aware of these non-septicemic cases.

REFERENCE:
Dettwiler M, et al. Bacillus anthracis as a cause of bovine abortion - a necropsy case requiring special biosafety measures. Schweiz Arch Tierheilkd. 2018 Sep;160(9):547-552. doi: 10.17236/sat00176. PubMed PMID: 30206051.

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