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

Plasmodium vivax resistance to chloroquine in Dawei, southern Myanmar

Guthmann JP, Pittet A, Lesage A, Imwong M, Lindegardh N, Min Lwin M, Zaw T, Annerberg A, De Radiguès X, Nosten F
Download
Download
Abstract
OBJECTIVE: To assess the efficacy of chloroquine in the treatment of Plasmodium vivax malaria in in Dawei District, southern Myanmar. METHODS: Enrolled patients at Sonsinphya clinic >6 months of age were assessed clinically and parasitologically every week for 28 days. To differentiate new infections from recrudescence, we genotyped pre- and post-treatment parasitaemia. Blood chloroquine was measured to confirm resistant strains. RESULTS: Between December 2002 and April 2003, 2661 patients were screened, of whom 252 were included and 235 analysed. Thirty-four per cent (95% CI: 28.1-40.6) of patients had recurrent parasitaemia and were considered treatment failures. 59.4% of these recurrences were with a different parasite strain. Two (0.8%) patients with recurrences on day 14 had chloroquine concentrations above the threshold of 100 ng/ml and were considered infected with chloroquine resistant parasites. 21% of failures occurred during the first 3 weeks of follow-up: early recurrence and median levels of blood chloroquine comparable to those of controls suggested P. vivax resistance. CONCLUSIONS: Plasmodium vivax resistance to chloroquine seems to be emerging in Dawei, near the Thai-Burmese border. While chloroquine remains the first-line drug for P. vivax infections in this area of Myanmar, regular monitoring is needed to detect further development of parasite resistance.
Countries
Myanmar
DOI
10.1111/j.1365-3156.2007.01978.x
Published Date
01-Jan-2008
PubMed ID
18291007
Languages
English
Journal
Tropical Medicine and International Health
Volume / Issue / Pages
Volume 13, Issue 1
Issue Date
17-Feb-2008
Dimensions Badge