The species of Moraxella that is most commonly associated with human infections, primarily of the respiratory tract, is:
a. M. catarrhalis.
b. Moraxella lacunata.
c. Moraxella canis.
d. Moraxella atlantae.
True cocci, such as most Neisseria spp. and Moraxella catarrhalis, can be differentiated from morphologically similar Moraxella species by:
a. comparing the penicillin susceptibility testing results of the bacteria.
b. subjecting the bacterium to noninhibitory concentrations of penicillin.
c. identifying the resistance of Moraxella to many <-lactam antimicrobial agents.
d. performing the deoxyribonucleic acid (DNA) test.
This bacterium is unique in that it does not possess a flagellum but is motile by gliding motility.
a. Acidovorax spp.
b. Sphingobacterium spp.
c. Spingomonas spp.
d. Pseudomonas spp.
Although no definitive guidelines are available for the treatment of Sphingomonas paucimobilis infections, which antibiotic appears to have potential activity against this organism?
a. Penicillin
b. Ttrimethoprim-sulfamethoxazole combi-nation
c. Amoxicillin and Flagyl
d. Isoniazid and Imipenem
A nasopharyngeal aspirate is cultured on Bordet-Gengou agar, and growth is observed. The colonies are also subjected to a direct fluorescent antibody (DFA) stain, which is also positive. On the basis of these findings, the antimicrobial therapy that should be administered to the pa-tient is:
a. azithromycin.
b. gentamycin.
c. streptomycin.
d. imipenem.
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