Organisms belonging to the genus Legionella are:

Organisms belonging to the genus Legionella are:

a. gram-positive diplococci.
b. gram-positive diphtheroid bacilli.
c. gram-negative coccobacilli.
d. faintly staining, thin gram-negative bacilli.

B. pertussis colonies growing on Regan-Lowe medium yields which of the following colonial morphologic appearances?

a. Star-shaped colonies
b. Mercury-drop colonies
c. Yellow-pigmented colonies
d. Shiny black-pigmented colonies

Which of the following statements best describes the habitats of Acidovorax, Sphingobacterium, and Sphingomonas?

a. Habitats are limited to the upper respira-tory tract of various mammals.
b. Habitats are unknown.
c. Habitats are limited to the soil and water environment.
d. Habitats are limited mostly to water sources.

Organisms belonging to the genus Brucella are:

a. gram-positive diplococci.
b. gram-positive diphtheroid bacilli.
c. gram-negative coccobacilli.
d. gram-negative bacilli.

The primary habitat for Vibrio spp. is:

a. freshwater.
b. the upper respiratory tract of various mammals.
c. brackish or marine water.
d. the soil and water environment.

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Organisms belonging to the genus Legionella are:

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