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Exp. Zool."],"published-print":{"date-parts":[[2015,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:label\/>\n                    <jats:p>\n                      Aggression can alter infectious disease dynamics through two, non\u2010exclusive mechanisms: 1) increasing direct contact among hosts and 2) altering hosts' physiological response to pathogens. Here we examined the latter mechanism in a social songbird by manipulating intraspecific aggression in the absence of direct physical contact. We asked whether the extent of aggression an individual experiences alters glucocorticoid levels, androgen levels, and individual responses to infection in an ecologically relevant disease model: house finches (\n                      <jats:italic>Haemorhous mexicanus<\/jats:italic>\n                      ) infected with\n                      <jats:italic>Mycoplasma gallisepticum<\/jats:italic>\n                      (\n                      <jats:italic>MG<\/jats:italic>\n                      ). Wild\u2010caught male finches were housed in one of three settings, designed to produce increasing levels of aggression: 1) alone, with no neighbor (\u201cno neighbor\u201d), 2) next to a sham\u2010implanted stimulus male (\u201csham neighbor\u201d), or 3) next to a testosterone\u2010implanted stimulus male (\u201ctestosterone neighbor\u201d). Following one week of social treatment, focal males were experimentally infected with\n                      <jats:italic>MG<\/jats:italic>\n                      , which causes severe conjunctivitis and induces sickness behaviors such as lethargy and anorexia. While social treatment increased aggression as predicted, there were no differences among groups in baseline corticosterone levels, total circulating androgens, or responses to infection. Across all focal individuals regardless of social treatment, pre\u2010infection baseline corticosterone levels were negatively associated with the severity of conjunctivitis and sickness behaviors, suggesting that corticosterone may dampen inflammatory responses in this host\u2010pathogen system. However, because corticosterone levels differed based upon population of origin, caution must be taken in interpreting this result. Taken together, these results suggest that in captivity, although aggression does not alter individual responses to MG, corticosterone may play a role in this disease.\n                      <jats:italic>J. Exp. Zool. 323A: 39\u201351, 2015<\/jats:italic>\n                      . \u00a9 2014 Wiley Periodicals, Inc.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jez.1894","type":"journal-article","created":{"date-parts":[[2014,11,11]],"date-time":"2014-11-11T11:39:22Z","timestamp":1415705962000},"page":"39-51","source":"Crossref","is-referenced-by-count":8,"title":["House finch responses to\n                    <i>Mycoplasma gallisepticum<\/i>\n                    infection do not vary with experimentally increased aggression"],"prefix":"10.1002","volume":"323","author":[{"given":"James Stephen","family":"Adelman","sequence":"first","affiliation":[{"name":"Department of Biological Sciences Virginia Tech Blacksburg Virginia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ignacio Tom\u00e1s","family":"Moore","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences Virginia Tech Blacksburg 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