A middle-aged women presented to the emergency room complaining of cramping and gastrointestinal discomfort. She had recently attended a family reunion the past weekend. The event was a picnic where potato salad, hamburgers, deviled eggs, hot dogs and chips were served. A feces culture was requested resulting in no growth. What would be the next recommended follow-up testing?
a. Serologic testing for IgM and IgG
b. No follow-up testing required
c. Collect an additional specimen and at-tempt to cultivate on specialized media
d. Treat the patient with ampicillin
Bacteria described as being coryneform have which of the following morphologic features?
a. Squared rods with squared ends arranged in pairs
b. Short gram-positive cocci in branching chains
c. Resemble and are often referred to as Chinese letters
d. Long branching gram-positive bacilli
Quality control is set up on urea media. Which two organisms should be used to determine the validity of the media?
a. C. ulcerans and C. diphtheria
b. C. diphtheria and Streptococcus pneumo-niae
c. C. ulcerans and Corynebacterium pseu-dotuberculosis
d. C. glucuronolyticum and C. ulcerans
A catalase-positive, gram-positive bacillus that is not acid-fast, does not branch, and does not form spores could possibly belong to which group of bacteria?
a. Corynebacterium
b. Bacillus
c. Actinomyces
d. Mycobacterium
Bactericidal tests should be performed:
a. for severe and life-threatening infections.
b. for every clinically significant organism isolated from a clinical specimen.
c. for evaluation of antimicrobial agents usually considered bacteriostatic.
d. for bacteria isolated from wounds, wheth-er or not they are clinically significant.
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