An evaluation of balantidiasis begins with a medical history and physical examination.
Unless dehydration is present, the physical exam is usually normal.
Testing for balantidiasis is necessary to confirm this diagnosis. A stool specimen is required for examination, in order to look for the parasite, Balantidium coli.
A stool culture can also detect:
- Shigella infection
- Campylobacter enteritis
- Cryptosporidium enterocolitis
- Pseudomembranous colitis:
- Salmonella gastroenteritis
- Traveler's diarrhea due to bacterial infection
- E. coli
Additional tests used to evaluate balantidiasis may include:
Continue to Balantidiasis Treatment
- Aucott JN, Ravdin JI: Amebiasis and "nonpathogenic" intestinal protozoa. Infect Dis Clin North Am 1993 Sep; 7(3): 467-85. 
- Kamberoglou D, Savva S, Adraskelas N, Yannitsiotis A, Cocca E. Balantidiasis complicating a case of ulcerative colitis. Am J Gastroenterol. 1990 Jun;85(6):765-6.