Decline in sulfadoxine-pyrimethamine-resistant alleles after change in drug policy in the Amazon region of Peru

Antimicrob Agents Chemother. 2008 Feb;52(2):739-41. doi: 10.1128/AAC.00975-07. Epub 2007 Nov 19.

Abstract

The frequency of alleles with triple mutations conferring sulfadoxine-pyrimethamine (SP) resistance in the Peruvian Amazon Basin has declined (16.9% for dhfr and 0% for dhps compared to 47% for both alleles in 1997) 5 years after SP was replaced as the first-line treatment for Plasmodium falciparum malaria. Microsatellite analysis showed that the dhfr and dhps alleles are of common origin.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Alleles*
  • Animals
  • Antimalarials / pharmacology*
  • Antimalarials / therapeutic use
  • Dihydropteroate Synthase / genetics
  • Drug Combinations
  • Drug Resistance / genetics*
  • Health Policy*
  • Humans
  • Malaria, Falciparum / drug therapy*
  • Malaria, Falciparum / epidemiology*
  • Mutation
  • Peru
  • Plasmodium falciparum / drug effects
  • Plasmodium falciparum / enzymology
  • Plasmodium falciparum / genetics
  • Pyrimethamine / pharmacology*
  • Pyrimethamine / therapeutic use
  • Sulfadoxine / pharmacology*
  • Sulfadoxine / therapeutic use
  • Tetrahydrofolate Dehydrogenase / genetics

Substances

  • Antimalarials
  • Drug Combinations
  • fanasil, pyrimethamine drug combination
  • Sulfadoxine
  • Tetrahydrofolate Dehydrogenase
  • Dihydropteroate Synthase
  • Pyrimethamine