A phenotypic technique that examines the ability of bacteriophages, which are viruses capable of ...

D
Classic phenotypic techniques include biotyping (analyzing unique biologic or biochemical cha-racteristics), antibiograms (analyzing antimicrobial susceptibility patterns), and serotyping (se-rologic typing of bacterial or viral antigens, such as bacterial cell wall

• antigens). Bacterio-phage typing, which examines the ability of bacteriophages (viruses capable of infecting and lysing bacterial cells), and bacteriocin typing, which examines an organism's susceptibility to bacterial peptides (proteins) to attack certain strains, have been useful for typing P. aeruginosa and S. aureus, respectively. These techniques, however, are not widely available.

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D
E. corrodens can be recognized in culture by its bleachlike odor. The organism does not utilize glucose or other carbohydrates and is catalase-negative. However, it reduces nitrate to nitrite and hydrolyzes both ornithine and lysine.

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C
A. actinomycetemcomitans can be distinguished from A. aphrophilus by its positive test for cata-lase and its negative test for lactose fermentation.

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B
Capnocytophaga spp. can be identified with the isolation of a yellow-pigmented, thin, gram-negative rod with tapered ends that exhibits gliding motility and does not grow in ambient air.

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A
N. gonorrhoeae is glucose-positive but maltose- and lactose-negative. N. meningitidis is glucose- and maltose-positive and lactose-negative, and N. lactamica is positive for glucose, maltose, and lactose. M. catarrhalis is negative for all three.

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