Evidence map›Paper›PMID 33382824›Full record

ArticlePLoS pathogens2020

Multiple blood feeding in mosquitoes shortens the Plasmodium falciparum incubation period and increases malaria transmission potential.

W Robert Shaw, Inga E Holmdahl, Maurice A Itoe, Kristine Werling, Meghan Marquette, Douglas G Paton, Naresh Singh, Caroline O Buckee, Lauren M Childs, Flaminia Catteruccia

Open access · goldAbstract read
In one paragraph

Article in PLoS pathogens, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed, 1 pooled it
10.5field-weighted citation impact, top 1% 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

56 citing papers in PubMed, 1 synthesis or guideline pooled it, 100 citations in OpenAlex.

  1. A Systematic Review of the Effects of Temperature onInternational journal of environmental research and public health · 2021
    Pooled it
  2. Article
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  10. PfApiAT2 is a proline transporter essential for the transmission ofbioRxiv : the preprint server for biology · 2026
    Article
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  20. OocystMeter, a machine-learning algorithm to count and measurebioRxiv : the preprint server for biology · 2025
    Article
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

10 authors at 3 institutions in 1 country.

W Robert ShawDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0002-2806-9718
Inga E HolmdahlDepartment of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0001-9151-7504
Maurice A ItoeDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.
Kristine WerlingDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0002-5644-4036
Meghan MarquetteDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0002-2167-2573
Douglas G PatonDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0001-5755-2410
Naresh SinghDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.
Caroline O BuckeeDepartment of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0002-8386-5899
Lauren M ChildsDepartment of Mathematics, Virginia Tech, Blacksburg, Virginia, United States of America.ORCID 0000-0003-3904-3895
Flaminia CatterucciaDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.ORCID 0000-0003-3295-6683
Harvard University · USCenter for Disease Dynamics, Economics & Policy · USVirginia Tech · US

Funding

Epidemiology of Infectious Diseases and BiodefenseT32AI007535 · NIAID · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI GRAD, YONATAN H, MURRAY, MEGAN B · 1998 to 2025
$4.8M
Determining the interactions between mosquito oogenesis and Plasmodium falciparum survival and transmissionR01AI153404 · NIAID · HARVARD UNIVERSITY D/B/A HARVARD SCHOOL OF PUBLIC HEALTH · PI Flaminia Catteruccia · 2020 to 2026
$4.5M
Targeting steroid hormone signaling in Anopheles mosquitoes for malaria controlR01AI124165 · NIAID · HARVARD SCHOOL OF PUBLIC HEALTH · PI CATTERUCCIA, FLAMINIA · 2016 to 2020
$3.4M
Howard Hughes Medical InstituteNIAID NIH HHS R01 AI124165NIAID NIH HHS R01 AI153404NIAID NIH HHS T32 AI007535
6 · The paper itself

Abstract

Many mosquito species, including the major malaria vector Anopheles gambiae, naturally undergo multiple reproductive cycles of blood feeding, egg development and egg laying in their lifespan. Such complex mosquito behavior is regularly overlooked when mosquitoes are experimentally infected with malaria parasites, limiting our ability to accurately describe potential effects on transmission. Here, we examine how Plasmodium falciparum development and transmission potential is impacted when infected mosquitoes feed an additional time. We measured P. falciparum oocyst size and performed sporozoite time course analyses to determine the parasite's extrinsic incubation period (EIP), i.e. the time required by parasites to reach infectious sporozoite stages, in An. gambiae females blood fed either once or twice. An additional blood feed at 3 days post infection drastically accelerates oocyst growth rates, causing earlier sporozoite accumulation in the salivary glands, thereby shortening the EIP (reduction of 2.3 ± 0.4 days). Moreover, parasite growth is further accelerated in transgenic mosquitoes with reduced reproductive capacity, which mimic genetic modifications currently proposed in population suppression gene drives. We incorporate our shortened EIP values into a measure of transmission potential, the basic reproduction number R0, and find the average R0 is higher (range: 10.1%-12.1% increase) across sub-Saharan Africa than when using traditional EIP measurements. These data suggest that malaria elimination may be substantially more challenging and that younger mosquitoes or those with reduced reproductive ability may provide a larger contribution to infection than currently believed. Our findings have profound implications for current and future mosquito control interventions.

Indexed as

AnimalsAnophelesFeeding BehaviorFemaleInfectious Disease Incubation PeriodMalaria, FalciparumMosquito VectorsPlasmodium falciparum

Identifiers

PMID33382824
PMCPMC7774842
OpenAlexW3115838483

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.