Deck 34: Brucella

Question 1

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 1

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

Question 2

The animal reservoir for Brucella melitensis is:

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

Answer 2

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

Question 3

Individuals considered at greatest risk for contracting brucellosis are:

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

Answer 3

A
Brucellosis is a zoonosis and is recognized as a cause of devastating economic losses among domestic livestock.Each of the four Brucella spp.that are pathogenic for humans has a limited number of preferred animal hosts.Persons considered at greatest risk for contracting brucellosis are dairy farmers,livestock handlers,slaughterhouse employees,veterinarians,and laboratory personnel.

Question 4

Organisms belonging to the genus Brucella are:

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

Question 5

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.