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In vivo parasitological measures of artemisinin susceptibility

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dc.contributor Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand; Shoklo Malaria Research Unit, Mae Sot, Thailand; Menzies School of Health Research and Royal Darwin Hospital, Darwin, Australia; Division of Clinical Pharmacology, Department of Medicine, University
dc.creator Stepniewska, Kasia
dc.creator Ashley, Elizabeth
dc.creator Lee, Sue J
dc.creator Anstey, Nicholas
dc.creator Barnes, Karen I
dc.creator Binh, Tran Quang
dc.creator D'Alessandro, Umberto
dc.creator Day, Nicholas P J
dc.creator de Vries, Peter J
dc.creator Dorsey, Grant
dc.creator Guthmann, Jean-Paul
dc.creator Mayxay, Mayfong
dc.creator Newton, Paul N
dc.creator Olliaro, Piero
dc.creator Osorio, Lyda
dc.creator Price, Ric N
dc.creator Rowland, Mark
dc.creator Smithuis, Frank
dc.creator Taylor, Walter R J
dc.creator Nosten, François
dc.creator White, Nicholas J
dc.date 2010-01-19
dc.date.accessioned 2017-01-31T07:19:21Z
dc.date.available 2017-01-31T07:19:21Z
dc.identifier J Infect Dis 2010;201(4):570-9
dc.identifier 1537-6613
dc.identifier 20085495
dc.identifier 10.1086/650301
dc.identifier http://hdl.handle.net/10144/112694
dc.identifier http://fieldresearch.msf.org/msf/handle/10144/112694
dc.identifier The Journal of Infectious Diseases
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10144/112694
dc.description Parasite clearance data from 18,699 patients with falciparum malaria treated with an artemisinin derivative in areas of low (n=14,539), moderate (n=2077), and high (n=2083) levels of malaria transmission across the world were analyzed to determine the factors that affect clearance rates and identify a simple in vivo screening measure for artemisinin resistance. The main factor affecting parasite clearance time was parasite density on admission. Clearance rates were faster in high-transmission settings and with more effective partner drugs in artemisinin-based combination treatments (ACTs). The result of the malaria blood smear on day 3 (72 h) was a good predictor of subsequent treatment failure and provides a simple screening measure for artemisinin resistance. Artemisinin resistance is highly unlikely if the proportion of patients with parasite densities of <100,000 parasites/microL given the currently recommended 3-day ACT who have a positive smear result on day 3 is <3%; that is, for n patients the observed number with a positive smear result on day 3 does not exceed (n + 60)/24.
dc.language en
dc.rights Published by Infectious Diseases Society of America Archived on this site with permission and copyright 2010 by the Infectious Diseases Society of America, [url]http://www.journals.uchicago.edu/toc/jid[/url]
dc.title In vivo parasitological measures of artemisinin susceptibility
dc.type Article


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