Oh the topic that triggered the discussion in chat was cryptosporidiosis. It is somewhat serious if your immune system works and can be fatal if you have a deficient immune system. There is no cure for it, your body must make it's own antibodies. One of the symptoms is severe diarea for 2-3 weeks.
How can you get it? Well the virus is transmited through the feces of many reptiles and invertabrates (ie crickets).