Evidence map›Paper›PMID 18689621›Full record

ArticleThe American journal of tropical medicine and hygiene2008

Effects of Plasmodium falciparum mixed infections on in vitro antimalarial drug tests and genotyping.

Shengfa Liu, Jianbing Mu, Hongying Jiang, Xin-zhuan Su

Abstract read
In one paragraph

Article in The American journal of tropical medicine and hygiene, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

36 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Shengfa LiuLaboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-8132, USA. liuxie@xmu.edu.cn
Jianbing Mu
Hongying Jiang
Xin-zhuan Su

Funding

Malaria Parasite Sexual Development, Drug Resistance, and EvolutionZIAAI000892 · NIAID · NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES · PI SU, XINZHUAN · 2009 to 2025
$23.3M
Malaria Parasite Sexual Development, Drug Resistance, and EvolutionZ01AI000892 · NIAID · NIAID EXTRAMURAL ACTIVITIES · PI SU, XINZHUAN · 2001 to 2008
$2.4M
Intramural NIH HHS Z01 AI000892Intramural NIH HHS Z99 AI999999
6 · The paper itself

Abstract

Studying drug resistance in Plasmodium falciparum requires accurate measurement of parasite response to a drug. Factors such as mixed infection of drug-resistant and -sensitive parasites can influence drug test outcome. Polymorphic DNA sequences are frequently used to detect mixed infections; infections with a single genotype or having a minor allele smaller than a subjectively selected cut-off value are often considered single infection. We studied the effects of mixed parasite populations containing various ratios of parasites resistant and sensitive to chloroquine on outcomes of drug tests and how ratios of parasite mixtures correlated with genotypes using polymerase chain reaction-based methods. Our results show that a mixture with a resistant population as low as 10% could greatly impact a drug test outcome. None of the genotyping methods could reliably detect minor DNA alleles at < or = 10%. Mixed infection presents a serious problem for drug tests, and genotyping using microsatellite or other methods may not reliably reflect true ratios of alleles.

Indexed as

AnimalsAntimalarialsDrug ResistanceGenotypeInhibitory Concentration 50Malaria, FalciparumMicrosatellite RepeatsParasitic Sensitivity TestsPlasmodium falciparumPolymorphism, GeneticAntimalarials

Identifiers

PMID18689621
PMCPMC2680026

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.