Study summary
Individual humans are more attractive to certain mosquito species
Marrero KM, Castillo JS, Lucas-Barbosa D, Bellantuono AJ, Marrero MA, Cid D, Costa-da-Silva AL, Verhulst NO, DeGennaro M
Read the original paper- Study type
- Lab
- Year
- 2026
- Sample size
- 119 subjects
- Species tested
- Aedes aegypti, Aedes albopictus, Culex quinquefasciatus
- Published in
- iScience 29(8):117006
- Evidence strength
- Well-supported evidence
How it was tested
Each of 119 Miami volunteers (61 men, 58 women, ages 18 to 59) was tested in a uniport olfactometer: for the two Aedes species a forearm sat in the stimulus chamber and the share of 30 released females that flew into the trap was scored over 8 minutes, three trials per species; the night-biting Culex was tested with nylon sleeves each person had worn for 12 to 16 hours. Arm odor was collected for 90 minutes and analyzed by GC-MS, and forearm skin bacteria were profiled by full-length 16S sequencing. The top and bottom 10% of volunteers for each species were then compared.
Summary
A behavior and skin-chemistry study asking whether the people who attract mosquitoes are the same for every species. Researchers at Florida International University ran 119 volunteers against three common disease-carrying mosquitoes and matched each person's attractiveness to their skin odor and skin bacteria. It is the first study to rank the same people against several species at once. It tested untreated skin only and did not test any repellent.
Key findings
Each species picked a different set of favorites. No volunteer was highly attractive to all three, and attractiveness to one species barely predicted attractiveness to another (the strongest link, between the two Aedes species, was a weak correlation of about 0.35; the others were near zero). Aedes aegypti was slightly more drawn to men than women (about 92% versus 87% attraction), while the other two showed no sex difference. The chemistry differed by species too: Aedes aegypti and Culex favored people who lacked certain monoterpenes and cyclic alcohols, plant-type odor compounds, whereas the Asian tiger mosquito favored people whose skin gave off more of certain compounds, including ketones such as sulcatone. A few skin bacteria, among them Staphylococcus epidermidis, Cutibacterium granulosum and Corynebacterium kefirresidentii, showed up in the high-attraction groups of all three species. The authors suggest these odors and microbes could guide species-specific repellents, lures, or traps.
Limitations
Lab olfactometer testing one person at a time, so it shows how attractive each person is on their own, not who gets bitten when several people are together. Culex was tested with worn sleeves rather than live arms. A single-city volunteer pool, lower and more variable response rates for Ae. albopictus and Culex, and odor and microbe associations that are correlational, not proven causes. No repellent was tested.