L -lactic acid: a human-signifying host cue for the anthropophilic mosquitoAnopheles gambiae
| Autor: | Teun Dekker, Martin Geier, Ring T. Cardé, B. Steib |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Air stream
integumentary system General Veterinary biology Host (biology) Anopheles gambiae food and beverages Zoology biology.organism_classification Skin odour Intraspecific competition Lactic acid chemistry.chemical_compound Olfactometer chemistry Insect Science parasitic diseases Botany Bioassay Parasitology Ecology Evolution Behavior and Systematics |
| Zdroj: | Medical and Veterinary Entomology. 16:91-98 |
| ISSN: | 0269-283X |
| DOI: | 10.1046/j.0269-283x.2002.00345.x |
| Popis: | Using a dual-choice olfactometer, the role of L-lactic acid was investigated in relation to host-seeking and selection by female Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) mosquitoes in a Y-tube bioassay. L-lactic acid alone was not attractive, but it significantly augmented the attractiveness of CO2, skin odour and skin-rubbing extracts from humans and other vertebrates. Comparing the left and right index fingers of the same person, one could be made more attractive than the other by adding L-lactic acid to the air stream over that finger. The difference in L-lactic acid concentration between the two air streams offered to the mosquitoes fell within the natural range of variation emanating from a human hand, suggesting that L-lactic acid modulates intraspecific host selection by An. gambiae. Analysis of skin rubbings from various vertebrates (carnivores, chickens, primates, rodents, ungulates) indicated that humans have uniquely high levels of L-lactic acid on their skin. Tests with extracts of skin rubbings from cows and humans, with and without added L-lactic acid, suggest that naturally lower levels of L-lactic acid contribute to the lesser attractiveness of non-humans to An. gambiae s.s. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|