Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Cryptosporidiosis ?
    ### Response:
    Cryptosporidiosis (crypto) is an illness caused by a parasite. The parasite lives in soil, food and water. It may also be on surfaces that have been contaminated with waste. You can become infected if you swallow the parasite.    The most common symptom of crypto is watery diarrhea.
    