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

Stephanie S. Gervasi, Nathan Burkett-Cadena, Sarah C. Burgan, Aaron W. Schrey, Hassan K. Hassan, Thomas R. Unnasch, Lynn B. Martin

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

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.

Original languageEnglish
Article number20161278
JournalProceedings of the Royal Society B: Biological Sciences
Volume283
Issue number1836
DOIs
StatePublished - Aug 17 2016

Scopus Subject Areas

  • General Immunology and Microbiology
  • General Biochemistry, Genetics and Molecular Biology
  • General Environmental Science
  • General Agricultural and Biological Sciences

Keywords

  • Corticosterone
  • Epizootic
  • Glucocorticoid
  • Mosquito
  • Transmission

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