Deck 35: Brucella

Question 1

The animal reservoir for Brucella melitensis is:

A) cattle.
B) sheep or goats.
C) swine.
D) dogs.

Answer 1

B
The reservoir for B.melitensis is sheep or goats.Cattle are the reservoir for B.abortus; swine is the reservoir for B.suis, and dogs are the reservoir for B.canis.

Question 2

Although in vitro susceptibility testing is not reliable, which regimen of antibiotics is recommended for Brucella infections?

A) Penicillin and azithromycin
B) Ampicillin and gentamycin
C) Doxycycline and rifampin
D) Gentamycin and vancomycin

Answer 2

C
For initial therapy, doxycycline or tetracycline in combination with streptomycin or rifampin is recommended.

Question 3

Facultative, intracellular parasitic bacteria are those that are able to:

A) be cultured with or without oxygen but in cell cultures only.
B) exist in both intracellular and extracellular environments.
C) be cultured only with oxygen and in cell cultures.
D) be cultured only inside living organisms such as mice.

Answer 3

B
Brucella spp.are facultative, intracellular parasites that are able to exist in both intracellular and extracellular environments.

Question 4

Individuals considered at greatest risk for contracting brucellosis are:

A) dairy farmers.
B) fishermen.
C) prison guards.
D) those working with exotic birds.

Question 5

Organisms belonging to the genus Brucella are:

A) gram-positive diplococci.
B) gram-positive diphtheroid bacilli.
C) gram-negative coccobacilli.
D) gram-negative bacilli.