LogoLogoMSF Science Portal
  • My saved items
logo

© Médecins Sans Frontières

MSF Science Portal
About MSF Science Portal
About MSF
Contact Us
Frequently Asked Questions (FAQs)
Privacy Policy
Terms of Use

v2.1.4829.produseast1

Journal Article > Research

Molecular genotyping in a malaria treatment trial in Uganda - unexpected high rate of new infections within 2 weeks after treatment

Mugittu K, Priotto G, Guthmann JP, Kiguli J, Adjuik M, Snounou G, Beck HP, Mshinda H, Olliaro PL, Taylor WRJ
Download
Download
Abstract
Polymerase chain reaction (PCR) genotyping of malaria parasites in drug efficacy trials helps differentiate reinfections from recrudescences. A combination therapy trial of one (n = 115) or three (n = 117) days artesunate (1AS, 3AS 4 mg/kg/day) plus sulphadoxine-pyrimethamine (SP) vs. SP alone (n = 153) was conducted in Mbarara, a mesoendemic area of western Uganda. All paired recurrent Plasmodium falciparum parasitaemias on days 7, 14, 21 and 28 post-treatment were genotyped by PCR amplification and analysis of glutamate-rich protein (glurp) and merozoite surface proteins (msp) 1 and 2 genes to distinguish recrudescent from new infections. A total of 156 (1AS = 61, 3AS = 35, SP alone = 60) of 199 paired recurrent samples were successfully analysed and were resolved as 79 recrudescences (1AS = 32, 3AS = 8, SP = 39) and 77 as new infections (1AS = 29, 3AS = 27, SP = 21). The ratios of proportions of new to recrudescent infections were 0.2, 0.9, 1.4 and 1.9 on days 7, 14, 21 and 28, respectively (P < 0.001, chi(2) test for linear trend). Unexpected high new infection rates were observed early in follow-up on days 7 [5/26 (19.2%)] and 14 [24/51 (47.1%)]. These results impact significantly on resistance monitoring and point to the value of genotyping all recurrent infections in antimalarial trials.
Countries
Uganda
Subject Area
malaria
DOI
10.1111/j.1365-3156.2007.01813.x
Published Date
01-Feb-2007
PubMed ID
17300628
Languages
English
Journal
Tropical Medicine and International Health
Volume / Issue / Pages
Volume 12, Issue 2
Issue Date
01-Feb-2007
Dimensions Badge