JOURNAL OF THE JAPANESE ASSOCIATION OF RURAL MEDICINE

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Our epidemiological research on clonorchis sineneis conducted in Yamamoto-gun, Akita Prefecture from 1959 through 1961 reached to the following results:
1) The prevalence of this parasite in the eight districts of this county, among 998 villagers and 3445 primary school childsen attending nine schools was 10.9-66.0% and 0.9-17.4% respectively. By districts, the rate was higher on the northern coast of Hachiro-gata, and especially high around Asanai-numa.
2) Sarcocheilichthys variegatus, acheilognatus lanceolata moriokae, pseudo perilampus typus and pseudorasbora parva obtained from Asanai-numa and Otomo-numa were found to carry metacercaria (clonorchis metacercaria). The acheilognatus lanceolata moriokae caught in Hachiro-gata was also proved to be carrying metacercaria.
3) Research into Asanai-numa and Aka-numa evidenced the inhabitation of parafossarulus manchourieus-Ebourguigant, the first intermediate host of that parasite.
4) On the basis of the above-mentioned results, it became evident that the county concerned should be classified among the districts hardest hit with clonorchis sinensis.

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Tetanus and gas gangrene are specific diseases of wound infection. In most cases gas gangrene come out of war injury, and is rarely found in peace time. We happened to treat a case of gas gangrene which developed from an agricultural traum. This is to report the symptoms and progress of that disease as studied thereon.

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