Skip to main content

Free Content Plasmodium falciparum: higher incidence of molecular resistance markers for sulphadoxine than for pyrimethamine in Kasangati, Uganda

Download Article:

You have access to the full text article on a website external to Ingenta Connect.

Please click here to view this article on Wiley Online Library.

You may be required to register and activate access on Wiley Online Library before you can obtain the full text. If you have any queries please visit Wiley Online Library

Abstract:

Summary

In November of 2000, Uganda changed its anti-malarial policy to replace chloroquine (CQ) with a combination of CQ and sulphadoxine–pyrimethamine (SP) as the first line agents. Information was limited on the efficacy of either drug. The present study was designed to provide baseline information on the efficacy of SP and the prevalence of molecular markers that are associated with SP resistance. Blood samples were collected on filter paper from 169 consenting patients who were diagnosed with malaria. Patients were treated with SP and followed for 14 days using the WHO clinical guidelines. The samples were analysed for molecular resistance markers and correlation of the molecular markers with clinical findings was assessed. SP monotherapy was efficacious for 140 of 163 (85.9%) treated patients. We found a high level of mutations in alleles which have previously been reported to be associated with SP resistance, but there was no correlation between clinical outcomes and molecular markers. With the exception of codon S108 in dhfr (dhfr S108N was at 94.9%), frequencies of dihydropteroate synthase (dhps) mutant and mixed alleles combined (A437G 89% and K540E 83.9%) were higher than those of dihydrofolate reductase (dhfr) (N51I 58.4%, C59R 31.3%).

Keywords: Plasmodium falciparum; dihydrofolate reductase; dihydropteroate synthase; molecular markers; pyrimethamine; sulphadoxine

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1365-3156.2005.01414.x

Affiliations: 1: Department of Biochemistry, Makerere University, Kampala, Uganda 2: Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden

Publication date: 2005-06-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more