Drug resistance-virulence relationship in Plasmodium falciparum causing severe malaria in an area of seasonal and unstable transmission

Hayder A. Giha, Mustafa I. Elbashir, Ishraga E. A-Elbasit, T. M E A-Elgadir, Gehad E. ElGhazali, Margaret J. Mackinnon, Hamza A. Babiker

Research output: Contribution to journalArticle

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Abstract

The pathogenesis of severe Plasmodium falciparum malaria is still obscure, but is believed to be multi-factorial, and among the important factors are intrinsic parasite-properties. Here we investigated the association between clinical manifestation of P. falciparum malaria (an indicator of virulence) and two parasite properties - drug resistance and gametocyte production. Among 996 P. falciparum infections detected in the out-patient clinic of Gedarif Hospital in eastern Sudan, there was no significant association between the incidence of severe versus mild disease and the presence of resistant alleles at the chloroquine-resistance transporter locus (pfcrt-T76) and the multi-drug-resistance locus (pfmdr1-Y86). However, among severe cases, there was a significantly lower prevalence of parasites carrying resistant alleles among patients that died versus survived. There was a trend towards a higher gametocyte rate among severe malaria patients compared with uncomplicated malaria cases. These results are discussed in relation to the fitness of drug resistant parasites.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalActa Tropica
Volume97
Issue number2
DOIs
Publication statusPublished - Feb 2006

Fingerprint

drug resistance
Plasmodium falciparum
Drug Resistance
malaria
Malaria
Virulence
Parasites
virulence
parasites
gametocytes
Falciparum Malaria
Alleles
alleles
chloroquine
Intrinsic Factor
loci
Sudan
multiple drug resistance
Chloroquine
Multiple Drug Resistance

Keywords

  • Mutation
  • pfcrt
  • pfmdr1
  • Resistance
  • Severe malaria
  • Virulence

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

Cite this

Drug resistance-virulence relationship in Plasmodium falciparum causing severe malaria in an area of seasonal and unstable transmission. / Giha, Hayder A.; Elbashir, Mustafa I.; A-Elbasit, Ishraga E.; A-Elgadir, T. M E; ElGhazali, Gehad E.; Mackinnon, Margaret J.; Babiker, Hamza A.

In: Acta Tropica, Vol. 97, No. 2, 02.2006, p. 181-187.

Research output: Contribution to journalArticle

Giha, Hayder A. ; Elbashir, Mustafa I. ; A-Elbasit, Ishraga E. ; A-Elgadir, T. M E ; ElGhazali, Gehad E. ; Mackinnon, Margaret J. ; Babiker, Hamza A. / Drug resistance-virulence relationship in Plasmodium falciparum causing severe malaria in an area of seasonal and unstable transmission. In: Acta Tropica. 2006 ; Vol. 97, No. 2. pp. 181-187.
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