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  • Title: In vitro sensitivity of Plasmodium falciparum to sulfadoxine and pyrimethamine.
    Author: Klinkaewnarong W, Chongsuphajaisiddhi T, Sabchareon A, Brockelman CR.
    Journal: Southeast Asian J Trop Med Public Health; 1985 Jun; 16(2):296-301. PubMed ID: 3906921.
    Abstract:
    An in vitro microtechnique of Rieckmann et al., (1978) modified by Yisunsri and Rieckmann (1980) using 3 media; Waymouth, Waymouth plus 10% human serum, and RPMI was assessed to determine the sensitivity of P. falciparum to sulfadoxine, pyrimethamine and its combination. The study confirmed the synergism between sulfadoxine and pyrimethamine. There was no interaction between media and drug tested. MIC1 and MIC2 of sulfadoxine in different media showed significant difference (p less than 0.001). No significant difference was observed in MIC1 and MIC2 of pyrimethamine in the three media used (p greater than 0.05). For sulfadoxine-pyrimethamine combination, MIC1 and MIC2 in Waymouth alone and plus 10% human serum showed no significance (p greater than 0.05) while in RPMI showed positive correlation (p less than 0.001). MIC1 might be more applicable for clinical evaluation than MIC2. At present Waymouth medium with 5% patient serum, is considered to be the most suitable for testing sensitivity of malarial parasites.
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