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Journal Article

The Incubation Period of Typhoid Fever

John Rice Miner
The Journal of Infectious Diseases
Vol. 31, No. 3 (Sep., 1922), pp. 296-301
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/30082241
Page Count: 6

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Topics: Incubation, Epidemics, Typhoid fever, Standard deviation, Typhoid, Infections, Chautauquas
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Abstract

The incubation period of typhoid fever is highly variable, ranging in the cases here recorded f rom 3 to 38 or 40 days. The mean incubation period in different epidemics ranges from 7 ± 0.26 to 19.50 ± 0.31 days, differing significantly from one epidemic to another. The standard deviations range from 1.84 ± 0.18 to 8.85 ± 1.17. The distributions are positively skew. The results here obtained are consonant with the belief that the length of the incubation period depends in part on the virulence of the infection. The means of the epidemics due to infected water are 13.81 ± 0.83, 1938 ± 1.66, and 19.50 ± 0.31, whereas the means for those due to infected food, in which the dose was probably more massive, are 7 ± 0.26 and 9.54 ± 0.39.

Notes and References

This item contains 11 references.

[Footnotes]
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    Public Health, 1917, 5, p 157.
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    Pub. Health Repts., No. 104.
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