Difference between revisions of "Brucella abortus"

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*Bovine brucellosis:
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{{OpenPagesTop}}
**Caused by ''Brucella abortus''
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{{Taxobox
**Eradicated in many countries including UK
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|name              =''Brucella abortus''
**Infection usually by ingestions but also venereal, skin abrasions, inhalation, transplacental
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|phylum            =Proteobacteria
**Abortion storms in susceptible herds
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|class              =Alpha Proteobacteria
**Abortion after fifth month of gestation due to placentitis
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|order              =Rhizobiales
**Brucellae excreted in foetal fluids for 2-4 weeks following abortion and at subsequent parturitions without abortion
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|family            =Brucellaceae
**Infection of mammary glands and lymph nodes persists for years
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|genus              =Brucella
**Excreted intermittently in milk for years
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|species            =''B.abortus''
**Seminal vesicles, ampullae, testicles and epididymus infected in bulls; necrotising orchitis
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}}
**Decreased fertility in cows and bulls; decreased milk production
 
**Localisation in [[Spleen - Anatomy & Physiology|spleen]] and lymphatic tissue of non-pregnant animals
 
**Occasionally causes [[Joints Inflammatory - Pathology#In Cattle|arthritis]]
 
*Isolated from closed cases of [[Bursae and Tendons Inflammatory - Pathology#Poll Evil and Fistulous Withers|poll evil and fistulous withers]] in horses
 
  
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[[File:Brucelliosis.jpg|right|thumb|250px|<small><center> Swollen caribou “knee” joint due to brucellosis. (Wildlife Alaska
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2008, Wikimedia commons)</center></small>]]
  
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''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.
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''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.
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==Control==
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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.
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{{Learning
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|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Brucella+abortus%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&publishedstart=2000&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all&x=43&y=8 ''Brucella abortus'' publications since 2000]
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}}
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{{OpenPages}}
 
[[Category:Brucella species]]
 
[[Category:Brucella species]]
[[Category:Cattle]]
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[[Category:Expert_Review]]

Latest revision as of 16:43, 5 July 2012


Brucella abortus
Phylum Proteobacteria
Class Alpha Proteobacteria
Order Rhizobiales
Family Brucellaceae
Genus Brucella
Species B.abortus
Swollen caribou “knee” joint due to brucellosis. (Wildlife Alaska 2008, Wikimedia commons)

Brucella abortus is a species of the Brucella bacteria genus and causes 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. Also in spleen and lymphatic tissue of non-pregnant animals. It has been isolated from closed cases of poll evil and fistulous withers in horses.

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.


Brucella abortus Learning Resources
CABICABI logo.jpg
Literature Search
Search for recent publications via CAB Abstract
(CABI log in required)
Brucella abortus publications since 2000



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