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Efficacy of Malaria Prophylaxis in American and Swiss Travelers to Kenya

H. O. Lobel, J. M. Roberts, B. Somaini and R. Steffen
The Journal of Infectious Diseases
Vol. 155, No. 6 (Jun., 1987), pp. 1205-1209
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/30106366
Page Count: 5
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Efficacy of Malaria Prophylaxis in American and Swiss Travelers to Kenya
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Abstract

The protective effect of malaria chemoprophylaxis with either $Fansidar^®$ (pyrimethaminesulfadoxine) or chloroquine was estimated by determining the attack rates of Plasmodium falciparum infections acquired in Kenya and imported by U. S. and Swiss travelers who had used no chemoprophylaxis, who had used only chloroquine for prophylaxis, and who had used Fansidar weekly, either alone or in combination with chloroquine. The estimated attack rates were almost identical in U. S. and Swiss travelers. The attack rate per 100,000 travelers averaged 280 in those who did not use chemoprophylaxis, 162 in those who took 4-aminoquinolines (P >.05), and 27 in those who used Fansidar for prophylaxis (P < .001). Non-immune travelers to Kenya have an appreciable risk of acquiring a P. falciparum infection and need to be informed of current guidelines for chemoprophylaxis. The changing drug susceptibility patterns in Africa require continuous evaluation of the efficacy of recommended drug regimens for malaria prophylaxis.

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