05-30-2010, 07:17 AM
A 36-year-old immigrant from Peru presents to the physician™s office because of difficulty swallowing liquids. He says he also has difficulty belching. Physical examination is unremarkable. Barium swallow shows a dilated esophagus, and manometry confirms absent peristalsis in the smooth muscle portion of the esophagus. If this patient™s symptoms are caused by infection, which of the following organisms is the most likely cause?
A. Cytomegalovirus
B. Babesia divergens
C. Toxoplasma gondii
D. Isospora belli
E. Brucella melitensis
F. Trypanosoma cruzi
G. Campylobacter fetus
A. Cytomegalovirus
B. Babesia divergens
C. Toxoplasma gondii
D. Isospora belli
E. Brucella melitensis
F. Trypanosoma cruzi
G. Campylobacter fetus