Host stress hormones alter vector feeding preferences, success, and productivity

Stress hormones might represent a key link between individual-level infection outcome, population-level parasite transmission, and zoonotic disease risk. Although the effects of stress on immunity are well known, stress hormones could also affect host–vector interactions via modification of host beh...

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Bibliographic Details
Published in:Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2016-08, Vol.283 (1836), p.20161278-20161278
Main Authors: Gervasi, Stephanie S., Burkett-Cadena, Nathan, Burgan, Sarah C., Schrey, Aaron W., Hassan, Hassan K., Unnasch, Thomas R., Martin, Lynn B.
Format: Article
Language:English
Subjects:
Animals
Corticosterone
Corticosterone - blood
Culicidae - physiology
Epizootic
Feeding Behavior
Finches - blood
Finches - parasitology
Glucocorticoid
Insect Vectors - physiology
Mosquito
Stress, Physiological
Transmission
Zoonoses
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Summary:Stress hormones might represent a key link between individual-level infection outcome, population-level parasite transmission, and zoonotic disease risk. Although the effects of stress on immunity are well known, stress hormones could also affect host–vector interactions via modification of host behaviours or vector-feeding patterns and subsequent reproductive success. Here, we experimentally manipulated songbird stress hormones and examined subsequent feeding preferences, feeding success, and productivity of mosquito vectors in addition to defensive behaviours of hosts. Despite being more defensive, birds with elevated stress hormone concentrations were approximately twice as likely to be fed on by mosquitoes compared to control birds. Moreover, stress hormones altered the relationship between the timing of laying and clutch size in blood-fed mosquitoes. Our results suggest that host stress could affect the transmission dynamics of vector-borne parasites via multiple pathways.
ISSN:0962-8452
1471-2954
DOI:10.1098/rspb.2016.1278