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Unfortunately, action is taken against these factors once population collapses are underway. To avoid these post hoc responses, wildlife endocrinology aims to analyse physiological mediators that predict future population declines to inform wildlife management. Mediators typically investigated are stress hormones known as glucocorticoids, which are produced by the Hypothalamus\u2014Pituitary\u2014Interrenal axis (HPI axis). The HPI axis is the part of the endocrine system that helps amphibians cope with stress. Chronic increases in glucocorticoids due to stress can lead to immune dysfunction, which makes amphibians more susceptible to infectious diseases. Despite this predictive potential of glucocorticoids, interpretation of glucocorticoid data is confounded by sampling design and type. Glucocorticoid monitoring classically involves blood sampling, which is not widely applicable in amphibians as some are too small or delicate to sample, and repeated samples are often valued. To address this, we tried to validate skin swabbing via corticosterone (CORT) and adrenocorticotropin hormone (ACTH) injections in adults of two amphibian species: Eastern red-spotted newts, Notophthalmus viridescens viridescens, with natural skin infections with Batrachochytrium dendrobatidis (Bd) upon collection in the field, and Northern leopard frogs, Rana (Lithobates) pipiens, raised in captivity and na\u00efve to Bd exposure. Further, we determined the predictive potential of skin glucocorticoids on Bd load in the field via correlations in Eastern red-spotted newts. We found that hormones present in the skin are not related to the HPI axis and poorly predict infection load; however, skin hormone levels strongly predicted survival in captivity. Although skin swabbing is not a valid method to monitor HPI axis function in these species, the hormones present in the skin still play important roles in organismal physiology under stressful conditions relevant to wildlife managers.<\/jats:p>","DOI":"10.1093\/conphys\/coaf005","type":"journal-article","created":{"date-parts":[[2025,1,10]],"date-time":"2025-01-10T20:32:15Z","timestamp":1736541135000},"source":"Crossref","is-referenced-by-count":2,"title":["Dermal glucocorticoids are uncoupled from stress physiology and infection"],"prefix":"10.1093","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4054-8591","authenticated-orcid":false,"given":"Victor","family":"Quadros","sequence":"first","affiliation":[{"name":"Department of Biology, University of Massachusetts Boston , 100 Morrissey Blvd., Boston, MA 02125 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Michael","family":"Romero","sequence":"additional","affiliation":[{"name":"Department of Biology, Tufts University , Robinson Hall, Rm 369200 College Ave., Medford, MA 02155 ,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4559-1046","authenticated-orcid":false,"given":"Douglas C","family":"Woodhams","sequence":"additional","affiliation":[{"name":"Department of Biology, University of Massachusetts Boston , 100 Morrissey Blvd., Boston, MA 02125 ,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2025,2,11]]},"reference":[{"key":"2025051005014560200_ref1","doi-asserted-by":"publisher","first-page":"20220117","DOI":"10.1098\/rstb.2022.0117","article-title":"Introduction to the special issue amphibian immunity: stress, disease and ecoimmunology","volume":"378","author":"Assis","year":"2023","journal-title":"Philos Trans R Soc B: Biol 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