Loeffler's medium is useful in making a presumptive identification of Corynebacterium diphtheriae from a pharyngeal culture because it
A) detects hydrogen sulfide production.
B) inhibits the growth of normal upper respiratory flora.
C) enhances metachromatic granule formation.
D) detects toxin-producing strains.
Question 2
To diagnose diphtheria, the appropriate specimen for collection is a
A) portion of the membrane. B) portion of the black scab.
C) swab of the contaminated medical device. D) pharyngeal swab.
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