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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Brucella pinnipedialis
Etymology: Genus name: named after Sir David Bruce, who first identified the organism, which causes brucellosis.
Species epithet: refers to pinnipeds (seal, sea lion and walrus).
Significance:Brucella spp. have been isolated from marine mammals. The importance of B. pinnipedialis in Sweden is unknown.
  [Of minor importance]   
Alternative Species Name(s):Brucella pinnipediae
Type Strain:
Macromorphology (smell): Small non-haemolytic shiny and pale honey coloured colonies (0.5-1.0 mm in diameter), which are convex and circular.
Micromorphology: Non-motile coccoid or short rods (0.5-0.7 x 0.6-1.5), which are arranged singly or, less frequently, in pairs, short chains or small groups.
Gram +/Gram -:G-
Metabolism: Aerobic
Other Enzymes: Urease +
Biochemical Tests: H2S -
Fermentation of carbohydrates: Most Brucella spp. do not produce acid by fermentation of carbohydrates.
Spec. Char.: Optimal growth temperature: 37°C, but growth occurs between 20 and 40°C.
Disease:Abortion, abscesses, discospondylitis, epididymitis, meningitis
HostsDiseaseClinical picture
SealsBrucellosisAbortion, placentitis, epididymitis, meningitis, subcutaneous abscessation and discospondylitis. Mostly asymptomatic carriers
Genome Sequence:
Acc-noStrainSize (bp)Genome
CP002078 (Chrom. I) B2/94   

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AM158981 NCTC 12890T 1 430  

About 25 species have been described within genus Brucella and this genus is closely related to genus Bartonella. From a phylogenetic point of view, B. abortus, B. canis, B. ceti, B. melitensis, B. neotome, B. ovis, B. pinnipedialis and B. suis represent the same species (B. melitensis), but due to different host specificities, they have been affiliated with different species.
Reference(s): No. 101


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