Brucella abortus
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Brucella abortus is a species of the Brucella bacteria genus and causes Bovine brucellosis.
B.abortus uncommonly localises in joints, usually in carpal bursitis (hygroma) in cattle and bursitis in horses.
It affects cattle, transmission is by ingestion and abortion occurs in the last half of pregnancy. The placenta is covered by fibrinonecrotic tissue and the foetus often shows bronchopneumonia.