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9038 Microbiology

A patient was hospitalized after a road accident. The wounds became infected and the patient was treated with tobramycin, carbenicillin, and clindamycin. Five days after antibiotic therapy was initiated, the patient developed severe diarrhoea and pseudomembranous enterocolitis. Antibiotic associated diarrhoea and the more serious pseudomembranous enterocolitis can be caused by

AClostridium sordellii
BClostridium perfringens
CClostridium difficile
DS. aureus
Microbiology
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9043 Microbiology

A street person well known to the local public health clinic appears to have acute symptoms of hepatitis and tests positive for HDV antigen. Knowing that HDV requires HBV, which of the following sets of test results shows this patient had chronic HBV infection and was superinfected with HDV?

AHBsAg+, HBeAg+, Anti-HBcAg IgM+, Anti-HBcAg IgG-, Anti-HBsAg-
BHBsAg+, HBeAg+, Anti-HBcAg IgM-, Anti-HBcAg IgG+, Anti-HBsAg-
CHBsAg-, HBeAg-, Anti-HBcAg IgM-, Anti-HBcAg IgG+, Anti-HBsAg+
DHBsAg-, HBeAg-, Anti-HBcAg IgM-, Anti-HBcAg IgG-, Anti-HBsAg+
Microbiology
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9045 Microbiology

A 32-year-old female prostitute is seen at the public health clinic with fever, night sweats, and reports coughing up blood. Her medical history reveals that she is HIV positive and has lost 20 lbs over the past month. Acid-fast bacilli are observed in the sputum. After digestion of the sputum, isolation of the suspected organism is best accomplished by using which one of the following media?

ALoffler medium
BLowenstein-Jensen medium
CSheep blood agar
DTM agar
Microbiology
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