千葉県東南部丘陵地帯の野兎病に関する流行病学的研究
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概要
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In order to make an epidemiologic research about tularaemia, the writer attempted to study about this disease which had long been recognized in the south-eastern hilly region in Chiba prefecture (chiefly in Katsu-ura City, Otaki-machi in Isumi gun, Nagasa-machi and Kamogawa-machi in Awa-gun). The general conclusion is as follows : (I) An epidemiologic explanation was given to what was called the "rabbit's wen" which had been transmitted from antiquity in the south-eastern hilly region in Chiba Prefecture. (II) Infectious cases of tularaemia, regarded as almost certain, were found to have occurred in 1877 or thereabouts, and therefore it was made clear that the disease had been recognized in this prefecture even in early years of Meiji. (III) There was another infectious case supposed to have occurred in 1897, and it was attempted to measure the antibody in blood at this time, fifty-nine years later, but any specific antibody could not be seen. Judging from other cases, however, it was made clear that the antibody could be seen in blood even thirty years after suffering from it. (IV) From the research of the group of infectious cases in Isumi-gun and Awa-gun, it was made certain that there were more cases of non-symptomatic infection than had been expected. (V) It is supposed that the existence of the antibody in blood of a hunter, his family, and his dogs depends upom the contamination by bacterium tularense in the epidemic region. (VI) The percentages of non-symptomatic infection among hunters, their families, and their dogs were 93.5%, 50%, and 94% respectively in Fusano district in Katsu'ura City, the center of the epidemic region in Chiba prefecture, while those in Nagasa and Kamogawa district where there are fewer infectious cases were 51.1 %, 35.3 %, and 75 % respectively. Moreover, the quantity of the antibody in blood was also far more in the former district than in the latter one. (VII) There were many cases of tularaemia among those diagnosed as inguinallymphgranulom in the epidemic region of this disease. The possibility could be suggested from the infectious cases.
- 千葉大学の論文
- 1960-11-28