皮膚科疾患と自然環境との関係

RELATIONSHIP BETWEEN NATURAL ENVIRONMENT AND SKIN DISEASES

I．まえがき

　過去1カ年間（昭和40年7月〜41年6月）にわたつて，西日本の皮膚科医によつて診断された各種皮膚科疾患について，公衆衛生学的立場から地理病理学的検討を試みた。

　説明の便宜上，皮膚科疾患を，（A）一般に多い疾患（円形脱毛症，帯状疱疹，癜風及び尋常性白斑），（B）一般に少ない疾患（乾癬，皮膚癌及び皮膚結核），（C）特定の地域に発生する疾患（熱帯性疾患）の3群に大別して，生活環境，特に気候，地質，土壌などの如き自然的環境との関係について考察を試みた。

Studies on the geographic distribution of various kinds of dermatoses in the southern part of Japan for one year (1965-1966) were performed. The results were as follows :

1. Herpes zoster,tineaversicolor, alopecia areata, vitiligo vulgaris and filariasis : The incidence was very significantly different from place to place. They seem to ran paralled to both the length of daytime and higher temperature in summer.

2. Skin cancer, psoriasis vulgaris and tuberculosis of the skin : Their frequency of ocu-rrence was significantly different from place to place. They have some correlation with che-mical nature of soil. The incidence of skin cancer was higher in the area of slightly acidic soil, and that of cutaneous tuberculosis was higher in the area of old and slightly acidic soil, while that of psoriasis was higher in the area of strong acidic soil.

Their frequency was lower in the area of neutral and alkaline soil.