Cyclospora is a parasite that is composed of only one cell. It is too small to be seen with the naked eye (only 8-10 microns in diameter). Its full name is Cyclospora cayetanensis. It used to be called such names as cyanobacterium-like, coccidian-like, and Cyclospora-like bodies (CLBs). Cyclospora infects the small intestine (bowel) and usually causes watery diarrhea, with an average of about 6 to 7 stools per day. Other symptoms can include loss of appetite, weight loss, bloating, increased flatus (gas), stomach cramps, nausea, vomiting, tiredness, muscle aches, and low-grade fever.