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[[File:Brucella.jpg|right|thumb|250px|<small><center> Brucella spp. (Larry Stauffer 2002, Wikimedia commons)</center></small>]]

[[File:Brucella.jpg|right|thumb|250px|<small><center> ''Brucella'' spp. (Larry Stauffer 2002, Wikimedia commons)</center></small>]]

==Overview==

==Overview==

''Brucella'' species are small, ''non-moltile, Gram negative coccobacilli'''. They are '''facultative intracellular''' pathogens. ''Brucella'' bacteria are '''aerobic'' and '''capnophilic'''. They are '''catalase positive''' and '''oxidase and urease positive''', except for ''Brucella ovis''. They are '''modified Ziehl-Neelsen positive''', forming clusters of red coccobacilli on smears. Some of the species require enriched media for growth. They are also '''non-haemolytic'''.

''Brucella'' species are small, ''non-moltile, Gram negative coccobacilli'''. They are '''facultative intracellular''' pathogens. ''Brucella'' bacteria are '''aerobic'' and '''capnophilic'''. They are '''catalase positive''' and '''oxidase and urease positive''', except for ''Brucella ovis''. They are '''modified Ziehl-Neelsen positive''', forming clusters of red coccobacilli on smears. Some of the species require enriched media for growth. They are also '''non-haemolytic'''.

Smooth colonies of ''[[Brucella abortus|B. abortus]], [[Brucella melitensis|B. melitensis]]'' and ''[[Brucella suis|B. suis]]'' are small, glistening, blue and translucent after incubation for 3-5 days, and become opaque with age. Rough colonies of ''B. ovis'' and ''[[Brucella canis|B. canis]]'' are dull, yellow, opaque and friable. Slide agglutination with specific antisera can detect important antigens. Oxidative metaboloic rates can differentiate between species and ''[[Brucella abortus|B. abortus]]'' is lysed by specific bacterophages.

Smooth colonies of ''[[Brucella abortus|B. abortus]], [[Brucella melitensis|B. melitensis]]'' and ''[[Brucella suis|B. suis]]'' are small, glistening, blue and translucent after incubation for 3-5 days, and become opaque with age. Rough colonies of ''[[Brucella ovis|B. ovis]]'' and ''[[Brucella canis|B. canis]]'' are dull, yellow, opaque and friable. Slide agglutination with specific antisera can detect important antigens. Oxidative metaboloic rates can differentiate between species and ''[[Brucella abortus|B. abortus]]'' is lysed by specific bacterophages.

==Pathogenesis==

==Pathogenesis==

Enriched media is used for isolation along with a complement fixation test. Indirect and competitive ELISA, Serum agglutination test and antiglobulin tests can also be used.  

Enriched media is used for isolation along with a complement fixation test. Indirect and competitive ELISA, Serum agglutination test and antiglobulin tests can also be used.  

[[Category:To_Do_-_AimeeHicks]][[Category:Brucella_species]]

<big>'''[[:Category:Brucella_species|See here for a list of ''Brucella'' species]]'''</big>

 

|literature search = [http://www.cabi.org/cabdirect/FullTextPDF/2007/20073230792.pdf ''' Epidemiology and epizootology of brucellosis: a review.''' Gul, S. T.; Khan, A.; Faculty of Veterinary Science, University of Agriculture, Faisalabad, Pakistan, Pakistan Veterinary Journal, 2007, 27, 3, pp 145-151, many ref.]

 

 

 

 

[[Category:Brucella_species|A]]

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