The present study investigated characteristics of 24
parasite infection cases detected during
colonoscopy in a regional
hospital from January 2001 to December 2008. Sixteen
patients were confirmed with
Trichuris trichiura infection, 6
patients were with
Ascaris lumbricoides infection, 1
patient with
Enterobius vermicularis infection, and 1
patient with
Anisakis infection. Among them, 7
patients (43.8%) were asymptomatic.
Colonoscopy findings were normal in 18
patients (75.0%). Among the
patients with T. trichiura
infection,
colonoscopy showed several erosions in 2
patients (8.3%) and non-specific
inflammation of the affected segment of the
colon in 3
patients (12.5%). In 1
patient with
anisakiasis,
colonoscopy revealed a markedly swollen colonic wall. Stool examinations were performed before
treatment in 7
patients (29.2%) and were all negative for
parasite eggs or worms. These results suggest that
colonoscopy is a useful diagnostic approach for
parasitic infections even for asymptomatic
patients and for
patients with negative stool examinations.