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Am. J. Trop. Med. Hyg., s1-31(3), 1951, pp. 306-310
Copyright © 1951 by The American Society of Tropical Medicine and Hygiene

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The Survival Time of the Rickettsias of Murine Typhus in Infected Flea Feces1

E. R. Rickard

Samples of murine typhus-infected feces from fleas, Xenopsylla cheopis, remained infectious for roof rats by intraperitoneal inoculation in a high percentage of cases until 48 hours after the passage of the feces. Under the conditions of the experiments, at 72 hours after passage only 20 per cent of the samples were infectious and at 96 hours all the samples of feces tested had become noninfectious.


1 This study was conducted under the auspices of the International Health Division of The Rockefeller Foundation and the Florida State Board of Health.






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Copyright © 1951 by the American Society of Tropical Medicine and Hygiene.