Author:
Maekawa Emi,Aonuma Hiroka,Nelson Bryce,Yoshimura Aya,Tokunaga Fumio,Fukumoto Shinya,Kanuka Hirotaka
Abstract
Abstract
Background
The proboscis is an essential head appendage in insects that processes gustatory code during food intake, particularly useful considering that blood-sucking arthropods routinely reach vessels under the host skin using this proboscis as a probe.
Results
Here, using an automated device able to quantify CO2-activated thermo (35°C)-sensing behavior of the malaria vector Anopheles stephensi, we uncovered that the protruding proboscis of mosquitoes contributes unexpectedly to host identification from a distance. Ablation experiments indicated that not only antennae and maxillary palps, but also proboscis were required for the identification of pseudo-thermo targets. Furthermore, the function of the proboscis during this behavior can be segregated from CO2 detection required to evoke mosquito activation, suggesting that the proboscis of mosquitoes divide the proboscis into a "thermo-antenna" in addition to a "thermo-probe".
Conclusions
Our findings support an emerging view with a possible role of proboscis as important equipment during host-seeking, and give us an insight into how these appendages likely evolved from a common origin in order to function as antenna organs.
Publisher
Springer Science and Business Media LLC
Subject
Infectious Diseases,Parasitology
Cited by
44 articles.
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