From what i've read diarrhea is the main sign of the infection. One question i have is If a gecko poops liquid once then starts having normal poops is it still likely that Crypto could be present? My gecko had a solid poop then one liquidy one with sand in it and now is pooping normal. I found the following on Crypto:
Red 
What is Cryptosporidium?
Cryptosporidiosis (krip-toe-spo-rid-e-o-sis), is a diarrheal disease caused by a microscopic parasite, Cryptosporidium parvum. It can live in the intestine of humans and animals and is passed in the stool of an infected person or animal. Both the disease and the parasite are also known as "Crypto." The parasite is protected by an outer shell that allows it to survive outside the body for long periods of time and makes it very resistant to chlorine disinfection. During the past two decades, Crypto has become recognized as one of the most common causes of waterborne disease (drinking and recreational) in humans in the United States. The parasite is found in every region of the United States and throughout the world.
What are the symptoms of Crypto?
Symptoms include diarrhea, loose or watery stool, stomach cramps, upset stomach, and a slight fever. Some people have no symptoms.
How long after infection do symptoms appear?
Symptoms generally begin 2-10 days after being infected.


