The Cystoisospora belli organism,which contains two sporocysts with four sporozoites each,is recovered from fecal specimens and has also been implicated in traveler's diarrhea.The drug of choice to treat infection caused by C.belli is:

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C.belli oocysts are passed in the feces unsporulated or partially sporulated.Oocysts complete sporulation within 72 hours,although it may take longer,depending on the temperature.Sporulated oocysts contain two sporocysts,each with four sporozoites.C.belli has also been implicated in traveler's diarrhea.The drug of choice to treat infection is a trimethoprim-sulfamethoxazole combination antibiotic,which is administered two to four times a day for 10 to 14 days.

The Cystoisospora Belli Organism,which Contains Two Sporocysts with Four Sporozoites