The sources and modes of infection / by Charles V. Chapin.

  • Charles V. Chapin
Date:
1912
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Licence: In copyright

Credit: The sources and modes of infection / by Charles V. Chapin. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    a garrison of 250. G. Mayer 1 writes of a man who became a carrier from eating meat and later caused the infection of another. An outbreak of 38 cases was due to eating vegetables fertilized with the contents of a privy vault used by a man with liver trouble, who had paratyphoid B bacilli in his feces. Cholera Spirilla in Convalescents. — Usually the germs of cholera disappear from the feces early in convalescence, and until recently chronic carriers were unknown. Pfeiffer2 reviews the literature, and cites Simond's observation that the average duration of infection is only about 6 days, and that the longest seen by him was 18 days. Of 117 cases reported to Rumpel, not one carried the germs over 24 days. Abel and Claussen found the average of 17 cases to be 5 or 6 days, and Pfeiffer the average of 39 cases 10 days, though in 2 the infection persisted 23 days. Other writers have made similar observations. • Zirolla 3 found 29 convalescents excreting bacilli from 6 to 40 days. Zlatogoroff 4 followed 255 cases until three negative examinations were made. In 134 the spirilla dis- appeared by the fourteenth day, and in 22 they persisted after 21 days, in one case lasting for 56 days. Burgers 5 found the average duration of infection in a small outbreak was about 3 weeks from the beginning of sickness, but in one case the spirilla persisted for 69 days. According to Kolle,6 cholera spirilla are sometimes found in the intestines of con- valescents as long as 48 days. Rommelaere 7 reported a 1 G. Mayer, Centralbl. f. Bakteriol. [etc.], Jena, I Abt. Orig., 1910, LIII, 234. 2 Pfeiffer, Klin. Jahrb., Jena, 1908, XIX, 483. 3 Abst., Med. Officer, 1911, VI, 84. 4 Zlatogoroff, Centralbl. f. Bakteriol. [etc.], I Abt. Orig., Jena, 1911, XLVIII, 14. 6 Burgers, Hyg. Rundschau, Berl, 1910, XX, 169. 6 Kolle, Ztschr. f. Hyg. u. Infectionskrankh., Leipz., 1895, XVIII. 7 Rommelaere, J. de med., Brux., 1892, XCIV, 837.