Cryptosporidium: Cryptosporidium is a protozoan that causes a diarrheal illness similar to Giardia. Symptoms include watery diarrhea, headache, abdominal cramps, nausea, vomiting, and low-grade fever ...
The very first step to getting rid of giardia in your cat is to completely disinfect your environment. Take your cat and quarantine them in a safe environment away from the space they were inhabiting.