White-nose syndrome severity in North American and Palearctic bats

0455134 - ÚBO 2016 US eng A - Abstrakt
Pikula, J. - Banďouchová, H. - Bartonička, T. - Berková, Hana - Brichta, J. - Kováčová, V. - Linhart, P. - Turner, G. - Zukal, Jan - Martínková, Natália
White-nose syndrome severity in North American and Palearctic bats.
Abstracts: 45th Annual Symposium North American Society for Bat Research, Monterey, CA, October 28th-31st, 2015. Monterey: North American Society for Bat Research, 2015 - (Bonaccorso, F.; Kwiecinski, G.; Mistry, S.). s. 74
[Annual Symposium of the North American Society for Bat Research /45./. 28.10.2015-31.10.2015, Monterey]
Institucionální podpora: RVO:68081766
Klíčová slova: White-nose Syndrome * North American Bats * Palearctic Bats
Kód oboru RIV: EG - Zoologie

White-nose syndrome (WNS) decimates populations of hibernating bats in North America, yet species from Europe seem to survive better identical skin invasion by the fungal pathogen causing WNS. The discrepancy encourages a plethora of hypotheses on mechanisms leading to differential species survival of the same disease. To address the issue of intercontinental differences in WNS, we sampled bats from North American (Myotis lucifugus) and European bats (Myotis dasycneme, Myotis daubentonii, Myotis myotis) using non-lethal, ultraviolet light guided biopsy. We graded findings from a series of periodic acid–Schiff stained sections according to presence of distinct microscopic lesions consistent with the histopathologic criteria for WNS diagnosis. The findings were ordered with increasing severity from presence of the fungus on the wing surface to replacement of tissues in the whole wing thickness by the fungus. Surface fungal skin colonization, multiple and confluent cupping erosions and basement membrane
breach amounted to 100% of cases in M. lucifugus compared with 71, 63 and 65% in European bats,
respectively. Occurrence of full-thickness invasion, inflammatory response and fungal sequestration in M.
lucifugus was at least 10 to 30% higher than in European bats. Overall accumulative grading score was
significantly higher in North America compared to Europe, indicating that North American bats develop more severe pathology when infected with Pseudogymnoascus destructans. While the same range of dermatohistopathological findings was observed both in Europe and North America, their prevalence was
highest in M. lucifugus. The accumulation of wing damage likely contributes to increased mortality in M.
lucifugus.
Trvalý link: http://hdl.handle.net/11104/0255782