Kesinee ChotivanichRachanee UdomsangpetchWirongrong ChierakulPaul N. NewtonRonatrai RuangveerayuthSasithon PukrittayakameeSornchai LooareesuwanNicholas J. WhiteMahidol UniversityMae Sot General HospitalChurchill Hospital2018-07-242018-07-242004-04-01American Journal of Tropical Medicine and Hygiene. Vol.70, No.4 (2004), 395-397000296372-s2.0-1942501224https://repository.li.mahidol.ac.th/handle/20.500.14594/21395The susceptibility of 20 isolates of Plasmodium vivax on the Thailand-Myanmar border to seven antimalarial drugs was evaluated using the schizont maturation inhibition technique. The geometric mean 50% inhibition concentration (IC50) values were quinine = 308 ng/mL, amodiaquine = 14 ng/mL, chloroquine = 50 ng/mL, mefloquine = 127 ng/mL, sulfadoxine/pyrimethamine (80:1) = 800/10 ng/mL, pyrimethamine = 8 ng/mL, and artesunate = 0.5 ng/mL. Compared with P. falciparum in this area, P. vivax was more sensitive to chloroquine and artesunate, equally sensitive to quinine, and more resistant to mefloquine.Mahidol UniversityImmunology and MicrobiologyMedicineArticleSCOPUS