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[[File:Brucelliosis.jpg|right|thumb|250px|<small><center> Swollen caribou “knee” joint due to brucellosis. (Wildlife Alaska

[[File:Brucelliosis.jpg|right|thumb|250px|<small><center> Swollen caribou “knee” joint due to brucellosis. (Wildlife Alaska

  2008, Wikimedia commons)</center></small>]]

  2008, Wikimedia commons)</center></small>]]

''Brucella abortus'' is a species of the ''[[Brucella species - Overview|Brucella]]'' bacteria genus and causes [[Bovine brucellosis]].

''Brucella abortus'' is a species of the ''[[Brucella species - Overview|Brucella]]'' bacteria genus and causes [[Brucellosis - Cattle|bovine brucellosis]]. It mainly affects cattle, where 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.  

''B.abortus'' uncommonly localises in joints, usually in '''carpal bursitis (hygroma)''' in cattle and '''bursitis''' in horses.  

''B.abortus'' uncommonly localises in joints, usually in [[Capped Joints|'''carpal bursitis (hygroma)]]''' in cattle and '''bursitis''' in horses. Also in spleen and lymphatic tissue of non-pregnant animals. It has been isolated from closed cases of [[Poll Evil and Fistulous Withers|poll evil and fistulous withers]] 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.  

==Control==

==Control==

Vaccination of heifers against ''B. abortus'' in endemic regions by Strain S19, a live attenuated vaccine, stimulating a cell-mediated immune response. The vaccination of young animals interferes with serological testing. The 45/20 bacterin vaccine is less effective and the newer RB51 vaccine has no LPS O-antigen therefore not detected by serological tests and gives good protection.

Vaccination of heifers against ''B. abortus'' in endemic regions by Strain S19, a live attenuated vaccine, stimulating a cell-mediated immune response. The vaccination of young animals interferes with serological testing. The 45/20 bacterin vaccine is less effective and the newer RB51 vaccine has no LPS O-antigen therefore not detected by serological tests and gives good protection.

[[Category:Brucella species]]

[[Category:Brucella species]]

 

[[Category:To_Do_-_Review]]

[[Category:Expert_Review]]