実験動物の自然感染白癬と人への感染例

FUNGUS INFECTION TO HUMAN SKIN FROM MYCOSIS OF EXPERIMENTAL ANIMAL

I．はじめに

　実験動物に白癬の自然感染の生ずる事例は，諸外国では以前から報告がある。本邦ではそれ程注意されていなかつたが，昭和40年松田^2），大越ら^1）によつて東京都内の各所に於けるラットの白癬自然感染例が観察された。このような実験動物の自然感染白癬では時にそれに気付かずに推移する中には周囲の人への感染も割合容易に起り得るであろう事は想像に難くない。偶々吾々も都内研究所の技術員中に白癬の集団的な発生を見，更にその接触するラットを検索して白癬の自然感染を認め，これがラットの白癬に由来するものである事を証明し得たのでここに報告したい。

For cases of fungus infection among technicians in one laboratory in Tokyo from infection of T. mentagrophytes of rats of Wister strain were reported.

The lesions of the animals were reddish macules with slight scale and loss of hair. Alopecia started one month after keeping the rats in the animal room. It was found more frequently in the group of animals which were kept in 36 days in the animal room than the 29- and 49-days' group. T. mentagrophytes (type asteroides) was identified both from diseased and from normal hairs.

Six cases of tinea among technicians who treated the animals were found. The lesions occupied the face, the patellar region, especially hands and forearms. The lesions were erythemato-squamous plaques on the flexor surface of fingers and hands, and tinea circinata-type on the other parts of the body.

Mycologic study identified the same fungus in 4 of 6 cases as that from the animals.