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- W4252839278 abstract "Malarial lactate dehydrogenase (LDH), which uses 3-acetyl pyridine adenine dinucleotide as coenzyme in a reaction leading to the formation of pyruvate from L-lactate, may be used to study the susceptibility of Plasmodium falciparum to a drug in vitro. Several methods to determine the activity of this enzyme are available. One, the colorimetric method of Makler and colleagues, was modified slightly, by using sodium-2,3-bis-[2-methoxy-4-nitro-5-sulphophenyl]-2H-tetrazolium-5-carboxanilide (XTT) and following the reaction by measuring the optical density at 450 nm. Using two, culture-adapted strains of P. falciparum, this LDH assay was compared with the unmodified Makler's assay and with the isotopic microtest based on the incorporation of tritium-labelled hypoxanthine. Fresh, clinical P. falciparum isolates were also tested in the presence of several drugs, including chloroquine, mefloquine, quinine, halofantrine, atovaquone and qinghaosu derivatives. The results of the three assays were correlated for all the drugs tested except atovaquone. The two enzymatic assays are non-radioactive, rapid, reliable, inexpensive to perform and semi-automatic. However, they do require an initial parasitaemia of 2% with a haematocrit of 1.8%." @default.
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- W4252839278 date "1999-01-01" @default.
- W4252839278 modified "2023-09-26" @default.
- W4252839278 title "The microculture tetrazolium assay (MTA): another colorimetric method of testingPlasmodium falciparumchemosensitivity" @default.
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- W4252839278 doi "https://doi.org/10.1080/00034983.1999.11813392" @default.
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