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The disease

Epidemiology

 

Host ranges

 


B. melitensis
is considered to have the widest host range and is responsible for many outbreaks in cattle herds. In addition, human brucellosis from ingestion of milk of camels contaminated by this organism has become a serious public health problem in some countries.

B. abortus may cause abortions in sheep but this appears to be rare. B. suis may infect cattle but apparently cause no clinical disease. B. ovis and B. canis do not appear to cause natural infections in domestic animals except sheep and dogs, respectively. Dogs have become naturally infected with B. melitensis, B. abortus, and B. suis with subsequent abortions.

Brucella spp. and reservoirs

B. melitensis

goats, sheep, cattle, camel

B. abortus

cattle, buffalo, bison

B. suis

biovar

1,3

swine

biovar

2

swine, hare (Lepus europaeus)

biovar

4

caribou, reindeer

B. ovis

sheep

B. canis

dogs

B. neotomae

wood rat