Remarks on the occurrence of Weil's disease in the Netherlands
There is no doubt that during 1932 in the Netherlands the frequency of Weil's disease was really much higher than in the years before and thereafter. The peak can't be ascribed to the fact that Weil' disease in 1929 has been placed on the list of diseases with compulsary notification.
In comparing the years 1932, 1933 and 1934 with 1945, 1946 and 1947, it appears that the morbidity has decreased much more in the provinces of South Holland and Utrecht than in the other parts of the country.
The measures taken to diminish the contact with rat-urine only partly account for the decrease of the morbidity since 1932.
A periodical investigation into the leptospira carrier rates of rats living in several parts of the Netherlands is desirable.
KeywordsPeriodical Investigation Carrier Rate Compulsary Notification Leptospira Carrier
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