Abstract
Single sensillum recordings on the antennae of female Anopheles gambiae s.s. mosquitoes revealed neurons sensitive to aliphatic carboxylic acids within (a) subtype(s) sensilla trichodea. The aliphatic acids, acetic acid, propionic acid, butyric acid, iso-butyric acid and iso-valeric acid evoked an inhibition reaction in one of the cell types recorded from. A different cell type was excited in response to the former aliphatic acids, but showed a broader range of sensitivity, as acids with a longer carbon chain length, like caproic acid, elicited excitations as well. In addition, occasionally 1-octen-3-ol elicited an excitation reaction. This article focuses on the carboxylic acid inhibited cell type and its temporal pattern of response to different doses of the compounds. Furthermore, in order to compare the stimulatory effectiveness of the compounds on a per molecule basis, corrections were made for differences in volatility by determining the absolute number of molecules in the stimulus puff.
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