Evidence map›Paper›PMID 31679015›Full record

ArticleThe Journal of infectious diseases2020

Growth Rate of Plasmodium falciparum: Analysis of Parasite Growth Data From Malaria Volunteer Infection Studies.

Leesa F Wockner, Isabell Hoffmann, Lachlan Webb, Benjamin Mordmüller, Sean C Murphy, James G Kublin, Peter O'Rourke, James S McCarthy, Louise Marquart

Open access · hybridAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
5.5field-weighted citation impact, top 4% of its field
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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 36 citations in OpenAlex.

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  14. Parasite Viability as a Measure ofAntimicrobial agents and chemotherapy · 2022
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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

9 authors at 5 institutions in 3 countries.

Leesa F WocknerQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
Isabell HoffmannQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
Lachlan WebbQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
Benjamin MordmüllerInstitute of Tropical Medicine, University of Tübingen, Tübingen, Germany.
Sean C MurphyDepartments of Laboratory Medicine and Microbiology, University of Washington, Seattle, Washington, USA.
James G KublinFred Hutchinson Cancer Research Center, Seattle, Washington, USA.
Peter O'RourkeQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
James S McCarthyQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
Louise MarquartQIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
QIMR Berghofer Medical Research Institute · AUFred Hutch Cancer Center · USUniversity of Queensland · AUUniversity of Tübingen · DEUniversity of Washington · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGrowth rate of malaria parasites in the blood of infected subjects is an important measure of efficacy of drugs and vaccines.

methodsWe used log-linear and sine-wave models to estimate the parasite growth rate of the 3D7 strain of Plasmodium falciparum using data from 177 subjects from 14 induced blood stage malaria (IBSM) studies conducted at QIMR Berghofer. We estimated parasite multiplication rate per 48 hours (PMR48), PMR per life-cycle (PMRLC), and parasite life-cycle duration. We compared these parameters to those from studies conducted elsewhere with infections induced by IBSM (n = 66), sporozoites via mosquito bite (n = 336), or injection (n = 51).

resultsThe parasite growth rate of 3D7 in QIMR Berghofer studies was 0.75/day (95% confidence interval [CI], .73-.77/day), PMR48 was 31.9 (95% CI, 28.7-35.4), PMRLC was 16.4 (95% CI, 15.1-17.8), and parasite life-cycle was 38.8 hours (95% CI, 38.3-39.2 hours). These parameters were similar to estimates from IBSM studies elsewhere (0.71/day, 95% CI, .67-.75/day; PMR48 26.6, 95% CI, 22.2-31.8) but significantly higher (P < .001) than in sporozoite studies (0.47/day, 95% CI, .43-.50/day; PMR48 8.6, 95% CI, 7.3-10.1).

conclusionsParasite growth rates were similar across different IBSM studies and higher than infections induced by sporozoite.

Indexed as

AdolescentAdultFemaleHumansMalaria, FalciparumMaleParasitemiaPlasmodium falciparumRetrospective StudiesYoung AdultCHMIinduced blood stage malariaparasite growth ratePlasmodium falciparum 3D7statistical models

Identifiers

PMID31679015
PMCPMC7198127
OpenAlexW2988328648

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

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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.