Limited polymorphism in the dihydropteroate synthetase gene (dhps) of Plasmodium vivax isolates from Thailand

Antimicrob Agents Chemother. 2005 Oct;49(10):4393-5. doi: 10.1128/AAC.49.10.4393-4395.2005.

Abstract

The dhps sequences of 55 Plasmodium vivax isolates (39 from Thailand and 16 from elsewhere) revealed mutant Pvdhps at codons 383 and/or 553 (A --> G) in 33 isolates, all from Thailand. Mutations of Pvdhps and Pvdhfr were correlated. Multiple mutations were associated with high-grade sulfadoxine-pyrimethamine resistance.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antimalarials / pharmacology
  • Antimalarials / therapeutic use
  • Codon
  • DNA, Protozoan / genetics
  • DNA, Protozoan / isolation & purification
  • Dihydropteroate Synthase / chemistry
  • Dihydropteroate Synthase / genetics*
  • Drug Combinations
  • Drug Resistance
  • Genes, Protozoan*
  • Haplotypes
  • Malaria, Vivax / drug therapy
  • Malaria, Vivax / enzymology
  • Malaria, Vivax / genetics*
  • Nucleic Acid Amplification Techniques
  • Plasmodium vivax / drug effects
  • Plasmodium vivax / enzymology*
  • Plasmodium vivax / genetics*
  • Plasmodium vivax / isolation & purification
  • Point Mutation
  • Polymerase Chain Reaction
  • Polymorphism, Genetic*
  • Prevalence
  • Protein Structure, Tertiary
  • Pyrimethamine / pharmacology
  • Pyrimethamine / therapeutic use
  • Sulfadoxine / pharmacology
  • Sulfadoxine / therapeutic use
  • Thailand / epidemiology

Substances

  • Antimalarials
  • Codon
  • DNA, Protozoan
  • Drug Combinations
  • Sulfadoxine
  • Dihydropteroate Synthase
  • Pyrimethamine