NCIt definition : A parasitic protozoal infection caused by Balantidium coli that involves the large
intestinal mucosa. Signs and symptoms include nausea, vomiting, diarrhea, abdominal
pain, fever, headache and weight loss.;
Alternative definition : NICHD: A protozoan intestinal infection that is caused by Balantidium coli; the symptoms
may include watery diarrhea or dysentery, and the spectrum of illness ranges from
asymptomatic infection to fulminant and fatal disease.;