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March 26, 1932


JAMA. 1932;98(13):1100. doi:10.1001/jama.1932.02730390054024

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Rats as Transporters of Weil's Disease  Dr. D. J. Hulshoff, inspector of public health, and Dr. J. P. Anemaet have an article in the Nederlandsch Tijdschrift voor Geneeskunde on rats as the cause of contagion in Weil's disease. In the laboratories, 109 cases were carefully studied. There was a recrudescence during the period from 1924 to 1929, explainable possibly less by any increase in the incidence than by the fact that the disease become notifiable in 1924, and thus the attention of physicians was called to it. Rats were caught, especially at Gouda, a city near several bodies of water, and 196 rats were examined, 30 of which appeared to be infected. In 1929-1930, the six months of winter revealed that 8 per cent of the rats examined were infected. In 1930, the six summer months gave a percentage of 13, and October, November and December a percentage of 25.

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