The Control of Typhoid Fever in the Larger Cities of the Unitied States
The Control of Typhoid Fever in the Larger Cities of the Unitied States
George Clark Dunham
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Epidemiological studies will reveal 30 only those responsible for active cases; an^i consequently, these are usually the only ones ap^:rehended, with the except- ion that, in a few instances, food handlers are examined bac- teriologically and carriers detected by this method. It has been shown that a certain numbe-^ of persons will excrete the bacilli durinfj the incubation period cf the disease, and constitute a particularly dangerous source of infection as the fact that they are car-"iers is ...never suspected Many of the recovered cases continue to excrete the bacilli for a varyint? length of time after recovery but eventually f-. E elimination of the bacilli ceases. These con- stitute the so-called temporary carriers. Recovered cases that cease to excrete the bacilli within three months after recovery are usually referred to as temporary carriers; while those tnat continue to eliminate the bacilli after this period of time has elapsed are designater'! as chronic carriers. From time to time surveys have been made to de- termine, in so far as the methods at hand v/ould permit, the percentat^e of typhoid carriers in the general population of the different communities.
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