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1270 Microbiology

A veterinarian presents with a chief complaint of thin, watery, non-bloody diarrhea for the past two weeks. He appears fatigued and mildly dehydrated. Stool examination is negative for leukocytes and culture for bacterial pathogens is negative. Acid fast stain of the stool demonstrates oocysts that are 5-7 microns in diameter. Where does the sexual phase of this organism’s life cycle occur?

AAttached to the colonic mucosa of swine
BExtracellularly in the small intestine of muskrats and beavers
CIn the brush border of the intestinal epithelium of humans
DIntracellularly in the intestinal mucosa of felines
Microbiology
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1277 Microbiology

A 42-year-old man is brought to the emergency room in an ambulance after suffering a grand mal seizure at home. There is no history of recent illness, fever, headache, seizures, or head trauma. He drinks alcohol occasionally and denies any other drug use. Neurologic exam shows the patient to be ale and oriented. No focal abnormalities are noted. A CT scan of the head reveals multiple punctate calcifications, and two enhancing cystic lesions with surrounding edema. What is the most likely diagnosis?

AAmebiasis
BCytomegalovirus infection
CEchinococcosis
DNeurocysticercosis
Microbiology
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