Volume 75, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Malarone was compared with placebo in a double-blind, randomized, placebo-controlled trial of prophylaxis of malaria in predominately areas of Colombia. The study population consisted of 180 completely non-immune Colombian soldiers, male, average age 19 years, and average weight 63 kg. Twenty-four subjects were considered unevaluable because of compliance issues, including one Malarone subject (with no detectable drug levels) who became infected with Of the 97 evaluable subjects who received Malarone (250 mg atovaquone plus 100 mg proguanil hydrochloride) daily from 1 day before entering the endemic area to 7 days after leaving the endemic area, none became parasitemic. Of the 46 evaluable placebo subjects, 11 became infected with and 2 became infected with . The protective efficacy of Malarone for all malaria and for malaria was 100% (LL 95% CI = 63%) and 100% (LL 95% CI = 58%), respectively, and was 96% if the one case with undetectable blood levels was included. Malarone has high protective efficacy for in Colombia.


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  • Received : 13 Feb 2006
  • Accepted : 13 Apr 2006

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