In vitro activity of artemether against African isolates (Senegal) of Plasmodium falciparum in comparison with standard antimalarial drugs.
- 1 March 1998
- journal article
- research article
- Published by American Society of Tropical Medicine and Hygiene in The American Journal of Tropical Medicine and Hygiene
- Vol. 58 (3) , 354-357
- https://doi.org/10.4269/ajtmh.1998.58.354
Abstract
The in vitro activity of artemether against 56 African isolates of Plasmodium falciparum from Senegal was evaluated using an isotope-based drug susceptibility semi-microtest. The 50% inhibitory concentration (IC50) values for artemether were in a narrow range from 0.8 to 15.2 nM (mean IC50 = 3.43 nM) and the 95% confidence interval (CI) was 2.50-4.36 nM. Artemether was equally effective on chloroquine-sensitive and chloroquine-resistant isolates (mean IC50 = 346 nM, 95% CI = 2.08-4.84 nM versus mean IC50 = 2.80 nM, 95% CI = 2.00-3.60 nM). There was a significant positive correlation between responses to artemether and mefloquine (r2 = 0.36, P < 0.001), artemether and quinine (r2 = 0.085, P < 0.05), artemether and halofantrine (r2 = 0.075, P < 0.05), quinine and mefloquine (r2 = 0.205, P < 0.01), quinine and halofantrine (r2 = 0.124, P < 0.05), and mefloquine and halofantrine (r2 = 0.801, P < 0.001). A positive correlation between these drugs suggests in vitro cross-resistance or at least in vitro cross-susceptibility.Keywords
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