Report on an outbreak of typhoid fever at Omaha, Nebr. - (1909-1910) / by L.L. Lumsden. The water supply of Williamson, W. Va., and its relation to an epidemic of typhoid fever / by W.H. Frost.
- Leslie Leon Lumsden
- Date:
- [1910]
Licence: In copyright
Credit: Report on an outbreak of typhoid fever at Omaha, Nebr. - (1909-1910) / by L.L. Lumsden. The water supply of Williamson, W. Va., and its relation to an epidemic of typhoid fever / by W.H. Frost. Source: Wellcome Collection.
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![ing, presumably, in unusual concentration of its sewage pollution. It is rather striking that the epidemic should have commenced to subside in February, when in all probability the amount of typhoid excreta emptied into the river immediately above Williamson was greater in January and February than in any other months of the year. The possibility of the existence of other conditions affecting the virulence or viability of typhoid bacilli in water suggests itself. What constitutes such conditions, however, is not known. Some light may perhaps be thrown upon this point by a^ careful compari- son of the climatological conditions existing at various places'during and prior to water-borne epidemics of typhoid fever and by careful studies of the biology of surface waters under varying climatological conditions. CONTACT. The 141 located cases of typhoid fever occurred in 99 houses. In 64 of these houses there was but 1 case in each house. In 32 houses there were two or more cases, and in 3 more houses, one case, with one or more suspected cases. Altogether, then, in approxi- mately one-third of the houses affected there was more than one case. A study of the accompanying map will show that in the ma- jority of instances where two or more cases occurred in a house, the interval between cases was such as to make contact infection of the later case from the earlier seem very probable. The houses having more than one case apiece may be tabulated as follows: Houses with— Number. Cases. 2 cases 23 46 1 case and 1 suspected case 2 2 G 18 2 cases and 1 suspected case 1 2 1 case and 2 suspected cases 1 1 4 cases . ... 1 4 4 cases and 1 suspected case ] 4 Total 35 77 In the 35 houses where there was more than one case in each house the total number of cases was 77-—approximately one-half of 60700°—Bull. 72—10 6](https://iiif.wellcomecollection.org/image/b28070793_0095.jp2/full/800%2C/0/default.jpg)
