Mosquito bites as a research tool: can scientists reproduce malaria infection on demand?
NCT ID NCT07816497
First seen Sep 11, 2026 · Last updated Sep 11, 2026
Summary
Researchers in Lambaréné, Gabon, want to see if they can safely and reliably infect healthy adult volunteers with malaria using bites from local Anopheles gambiae mosquitoes carrying a local strain of Plasmodium falciparum. The team raises the mosquitoes in the lab, feeds them malaria-infected blood from a local donor, and then lets them bite volunteers. After exposure, participants are checked daily for malaria parasites and treated with standard antimalarial drugs if they test positive or develop symptoms. The goal is to build a controlled human malaria infection model that reflects the parasites circulating in this part of Africa, which could help test future vaccines and drugs.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Controlled human malaria infection using bites from Anopheles gambiae mosquitoes carrying a local strain of Plasmodium falciparum
- What this could lead to
- If it works, this could give researchers in Gabon a local, African-based system for testing malaria vaccines and drugs against the exact parasite strains circulating there.
- What could go wrong
- The trial is small and early-stage, and it may not reliably infect enough volunteers to be useful. Participants are deliberately exposed to malaria and could develop symptoms, though the team monitors them daily and treats any infection promptly.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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20 people
The number who actually took part.
- Started
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Jul 2025
- Finished
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Feb 2026
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 45 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Healthy, adult volunteers aged 18 to 45 years old * Tympanic body temperature \< 37.5°C * Residence in Lambaréné or surroundings for the period of the trial * History of long-term residence (at least 5 years) in Gabon * Willingness to take two curative anti-malarial regimens * Reachable (24/7) by mobile phone during the CHMI and follow-up * A body mass index \<35 Exclusion Criteria: * Haemoglobin level \< 11 g/dl for female volunteers and \< 11.5 g/dl for male volunteers * Receipt of an investigational product in the 30 days preceding enrolment, or planned receipt during the study period * Prior receipt of an investigational malaria vaccine * Immunization with more than 3 other vaccines within the past month. * Positive for hepatitis B surface antigen (HBs-antigen) * Seropositive for hepatitis C virus (antibodies to HCV). * Positive HIV test * Abnormal level of transaminase (ALAT, ASAT) * Have been treated for malaria disease with an antimalarial drug or an antibiotic active on malaria parasites over the previous 28 days of the inoculation. * Any confirmed or suspected immunosuppressive or immunodeficient state, asplenia, recurrent, severe and chronic (more than 14 days) infections, immunosuppressant medication within the past 6 months (inhaled and topical steroids are allowed). * Use of immunoglobulins or blood products within 3 months prior to enrolment. * Sickle cell disease or any clinically relevant blood disorder. * History of a serious psychiatric condition that may affect participation in the study. * Positive urine pregnancy test or breastfeeding * Any other serious chronic illness requiring hospital specialist supervision * Suspected or known current alcohol abuse as defined by an alcohol intake of greater than 60 g per day. * Suspected or known injecting drug abuse in the 5 years preceding enrolment. * Contraindications to the use of the first-line anti-malarial medications: artemether/lumefantrine or atovaquone/proguanil. * Subjects unable to be closely followed for social, geographic or psychological reasons. * Any clinically significant abnormal finding on biochemistry or haematology blood tests, urine analysis or clinical examination. * History of seizure. * Any other significant disease, disorder or finding which, in the opinion of the Investigator, may significantly increase the risk to the volunteer because of participation in the study, affect the ability of the volunteer to participate in the study or impair interpretation of the study data.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Centre de Recherches Médicales de Lambaréné
Lambaréné, Moyen-Ogooué Province, 242, Gabon
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