Seasons and Weather in their Relation to Epidemics

(Jahreszeit und Witterung im Seuchengeschehen)—Typhoid, Paratyphoid, Dysentery, Poliomyelitis, Diphtheria, Scarlatina. By Wilhelm Donle. 192 pp. with 18 illustrations. Stuttgart: Ferdinand Enke Verlag, 1956

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The attractively printed book by Donle may be said to fall into three parts, namely, an introduction, a main part of almost 150 pages which deals in separate sections with the six infectious diseases enumerated in the title, and a final chapter in which an attempt is made to draw general conclusions from the evidence adduced. Four and a half closely printed pages containing references are appended. Since the author deals almost exclusively with the disease situations in Central Europe, particularly in Germany, it is natural that he quotes with not many exceptions German publications.

As is pointed out in the introduction, climatic conditions may exert an influence on the occurrence of infectious diseases in various ways. They may act directly upon the causative organisms, some of which may be benefitted by cold weather while others may find particularly favorable conditions in summer, a season during which flies also may play an important role in the transmission of some of the bacteria involved.