Early exposure to Batrachochytrium dendrobatidis causes profound immunosuppression in amphibians

Early exposure to Batrachochytrium dendrobatidis causes profound immunosuppression in amphibians Fungal pathogens have evolved a broad suite of strategies aiming at evading the host immune response. Amphibians are globally infected by the panzootic chytrid fungus Batrachochytrium dendrobatidis (Bd) and, while robust innate immune defences have been characterised, there is little evidence for the existence of effective adaptive immunity. We determine the immune response of the common midwife toad following challenge by Bd as larvae. Immune function was described for both the cell-mediated and antibody-mediated immune responses following infectious challenge as larval amphibians. While there were no significant differences in the ratio of neutrophils/lymphocytes between infected and uninfected individuals, early exposure of tadpoles to Bd significantly dampened the levels of circulating immunoglobulins (IgM and IgY) in the serum of juveniles after metamorphosis. Our results show that Bd immunosuppresses amphibians when infection occurs as larvae with potentially broad effects on the remodelling of immunity during metamorphosis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Wildlife Research Springer Journals

Early exposure to Batrachochytrium dendrobatidis causes profound immunosuppression in amphibians

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Life Sciences; Zoology; Ecology; Fish & Wildlife Biology & Management
ISSN
1612-4642
eISSN
1439-0574
D.O.I.
10.1007/s10344-017-1161-y
Publisher site
See Article on Publisher Site

Abstract

Fungal pathogens have evolved a broad suite of strategies aiming at evading the host immune response. Amphibians are globally infected by the panzootic chytrid fungus Batrachochytrium dendrobatidis (Bd) and, while robust innate immune defences have been characterised, there is little evidence for the existence of effective adaptive immunity. We determine the immune response of the common midwife toad following challenge by Bd as larvae. Immune function was described for both the cell-mediated and antibody-mediated immune responses following infectious challenge as larval amphibians. While there were no significant differences in the ratio of neutrophils/lymphocytes between infected and uninfected individuals, early exposure of tadpoles to Bd significantly dampened the levels of circulating immunoglobulins (IgM and IgY) in the serum of juveniles after metamorphosis. Our results show that Bd immunosuppresses amphibians when infection occurs as larvae with potentially broad effects on the remodelling of immunity during metamorphosis.

Journal

European Journal of Wildlife ResearchSpringer Journals

Published: Nov 30, 2017

References

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