Classification: ICD-9 023; ICD-10 A23.1

Syndromes and synonyms: Undulant fever, malta fever, Mediterranean fever.

Agent: Brucella melitensis, B. abortus, B. suis, and B. canis, intracellular Gram-negative bacilli.

Reservoir: Cattle, swine, goats, sheep, and various wildlife species. B. canis in dogs and coyottes.

Transmission: Enteric by ingestion of unpasteurized milk or milk products (soft cheese, yoghurt) from infected animals; direct inoculation of mucosa or skin with infected animal tissue (usually occupational in farmers or butchers); inhalation in housing of infected animals. Brucellosis is an occupational disease in shepherds, abattoir workers, veterinarians, dairy industry workers, and microbiology laboratory staff. No person-to-person transmission apart from isolated case reports of sexual transmission.

Cycle: Brucella

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