Abstract
Giardia lamblia cysts were found in the stool of 25 patients for health screening and in 3 inpatients at the laboratory of the Fujieda City Shida General Hospital, Shizuoka Prefecture from March 1988 to December 1989.
Epidemiologic investigation showed that there are no the common source such as drinking water, travel or animal contact. It may be given as a conclusion that human giardiasis in Fujieda and its neighboring towns are indigenous and the transmission appears mainly to occur from person to person.