A 19-year-old man comes to the physician for a 1-week history of watery diarrhea since returning from Mexico. He has no past medical history. A PPD test is 12 mm. Vitals are within normal limits. Which of the following is the most likely explanation for this patient’s findings?
Amoeba
Cysticerci
Cysts in water
Nematode
Trophozoite
