Studies on Large Tapeworm:Part 2. The epidemiological and clinical studies of the broad tapeworm (Diphyllobotorium latum)

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This paper described the epidemiology and the clinical picture of the broad tapeworm in Chugoku District of Japan. Geographically, the broad tapeworm was common in Hokkaido and the Northan part of Honshiuu. Before 1959, there was no report of the broad tapeworm infection in Chugoku District. In 1960, 2 cases of the broad tapeworm infections have been reported by the authors. Since 1960, 14 cases have been reported by the authors. 9 cases out of 14 cases were infected in Chugoku District and foci of infection are presented along the River Yoshii, Takahashi, Chiyo, and Saijoyo District.The infections were acquired by eating raw or slightly salted trouts from these Rivers, a custom which have been widespread among the Japanese.Most of the infections are asymptomatic. The complaints associated with the tapeworm are diarrhoea, soft stool (29%), general malaise (14%) and loss of weight (14%).In one of them, hyperchromic anemia is found with 14 cases of the tapeworm infestations. The eosinophilia of peripheral blood can not be found in any patients.The adult proglottide of the broad tapeworm could not be visualized on contrast roentgenograms of the small bowel.As a result of correct analysis of the personal history, the larvae of the broad tapeworm develop to maturity in the intestine about 20 days after the trout was ingested by man.
財団法人日本消化器病学会の論文