An anaerobic media, which contains ferric ammonium citrate and hemin, bile salts, and gentamicin, is used to isolate which group of organisms?
a. Bacteroides spp.
b. Clostridia spp.
c. Actinomyces spp.
d. Veillonella spp.
What is the proper specimen for culture and identification of the agent of acute sinusitis?
a. Aspirated material that has been collected by puncture of the maxillary sinus
b. Drainage material found in the upper res-piratory passages that has been collected with a swab
c. Coughed up sinus drainage collected in a sterile cup
d. Sinus drainage
The predominant organism in vaginal secretions from normal women of reproductive age is:
a. lactobacilli.
b. Streptococcus agalactiae.
c. Enterobacteriaceae.
d. staphylococci.
A 4-year-old boy who is in day care 3 days per week is irritable and scratching the area around his anus. What morphologic characteristics would most likely be observed on microscopic ex-amination of the appropriate specimen?
a. Large eggs, proglottid shape
b. Large eggs with a terminal spine
c. Two individual hooklets
d. Football-shaped eggs with one flattened side
Mucosal antibacterial properties, a valvelike mechanism, host immune responses, and defensins are all host defense mechanisms found in the ______ tract.
a. digestive
b. upper respiratory
c. urinary
d. genital
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