Abstract
The stools of twenty-one persones which drifted from Democratic Republic of Vietnam to Japan were examined against the eggs of intestinal parasites by the Tween 80 citric acid ether sedimentation method and Harada-Mori's culture method. The results of examinations proved that they were harbored by roundworms (38.1%), whipworms (9.5%) and hookworms (4.8%). Hookworms were carefully examined for the infective larvae by the culture method and adult worms (especially based on the bursa and inner ventral teeth) from infected dogs and all resembled Ancylostoma ceylanicum as describedby Biocca (1951) and Yoshida (1974). Although A. ceylanicum was not found in stray dogs captured in Kagoshima City which located in the main land of Kyushyu, it was found in Amami Oshima and Tokunoshima (Yoshida and Okamoto, 1972) and Okinawa (Oohama, 1941). Although A. ceylanicum are frequently encountered in cats and dogs of various areas, man is regarded as an abnormal host for A. ceylanicum (Chowdhury and Schad, 1972; Lie and Tan, 1959). However, the potential medical importance of this species lies therein, so that their pathogenicity of this s pecies is strong. Infections with these hookworms are easily overlooked, as the diagnosis is possible only by a careful examination of the ventral teeth present in the oral cavity and the bursa of male. Accordingly, this hookworm species may occur more frequently than the existing reports would suggest.
