Protozoa causing diarrhea.
Oocysts are 4-6 µm in diameter and exhibit partial acid-fast staining.
Mostly commonly seen in HIV+
Most common cause of chronic diarrhea in HIV patients.
Oocysts are 4-6 µm in diameter and exhibit partial acid-fast staining.
Swim regularly in pools with insufficient sanitation.
Hikers who drink untreated water.
Handling infected cattle.
Cryptosporidium
Viral 
Cyclospora
Bacterial
Salmonella
Campylobacter
Blastocystis species
Shigella