Geier, Martin and Bosch, Oliver J. and Boeckh, Juergen (1999) Ammonia as an attractive component of host odour for the yellow fever mosquito, Aedes aegypti. CHEMICAL SENSES, 24 (6). pp. 647-653. ISSN 0379-864X, 1464-3553
Full text not available from this repository. (Request a copy)Abstract
Behavioural responses of Aedes aegypti mosquitoes to ammonia were investigated in a modified Y-tube olfactometer. Ammonia was attractive in concentrations from 17 ppb to 17 ppm in air when presented together with lactic acid. Aqueous solutions of ammonia sails in concentrations comparable to those found in human sweat also increased the attractiveness of lactic acid. The role of lactic acid as an essential synergist for ammonia became further apparent by the fact that ammonia alone or in combination with carbon dioxide was not effective, even though the synergistic effect of carbon dioxide and lactic acid was corroborated. An extract from human skin residues, which attracts similar to 80% of the tested mosquitoes, contains both lactic acid and ammonia. The combination of these compounds, however, attracts no more than 45%, indicating that other components on human skin also play a role in host finding. Preparative liquid chromatography of the skin extract yielded three behaviourally active fractions which work together synergistically. Fraction ill contains lactic acid as the effective principle; the compositions of the other two have not been clarified yet. The attractiveness of fraction I was augmented considerably when ammonia was added, whereas the effect of fraction II was not influenced by ammonia. These results suggests that ammonia is part of the effective principle of fraction ii and contributes to the attractive effect of host odours.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DIPTERA; CULICIDAE; FEMALES; |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Alumni or Retired > Wirtsfindung bei blutsaugenden Insekten (Dr. Martin Geier) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Dec 2022 10:46 |
| Last Modified: | 06 Dec 2022 10:46 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48777 |
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