Dimicoli, S., et al. "Complete Recovery from Cryptosporidium parvum Infection with Gastroenteritis and Sclerosing Cholangitis after Successful Bone Marrow Transplantation in Two Brothers with X-Linked Hyper-IgM Syndrome."
The diarrhea is usually caused by opportunistic infections of the digestive tract; the most common disease agents are Cryptosporidium parvum, Giardia lamblia, Campylobacter, or rotaviruses.
About 70 percent of patients with XHIM develop liver disease by age 30, usually as a result of recurrent Cryptosporidium infections.
Cryptosporidium is another common parasitic organism that causes the symptoms of gastroenteritis.
Having the home water supply tested for possible contamination by Cryptosporidium parvum.