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10744 Pathology

Over a holiday weekend, more than 100 adults at a resort hotel develop a diarrheal illness marked by voluminous, watery stools more than 10 times per day. They also report headaches, abdominal cramping pain, and myalgias. On physical examination, they have manifestations of dehydration and mild fever. Laboratory studies of stool samples show no increase in leukocytes or fat and no RBCs. Their illness lasts just 1 to 3 days and resolves with no sequelae. Which of the following infectious agents is the most likely cause of their illness?

ACytomegalovirus
BClostridium botulinum
CNorovirus
DStaphylococcus aureus
Pathology
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10745 Pathology

A 45-year-old man receives a cardiac allograft for dilated cardiomyopathy. He has no problems with rejection, but 5 years later he has worsening exercise tolerance with increasing dyspnea and peripheral edema. Echocardiography shows a reduced ejection fraction of 35%. Which of the following pathologic abnormalities has he most likely developed in the allograft?

AAmyloidosis
BConstrictive pericarditis
CCoronary arteriopathy
DNon-Hodgkin lymphoma
Pathology
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