Prevalence of histopathology severity grades associated with natural skin infection by Pseudogymnoascus destructans.

Prevalence was calculated as the percentage of positive biopsies at the given grade in the dataset of all bats positive for WNS based on histopathology. All infection grades apply to the wing membrane and, aside from fungal skin surface colonisation in the absence of any other findings, are classified as white-nose syndrome (WNS). Tested = number of individuals examined for histopathology. WNS histo+ = number of individuals confirmed positive for WNS. Std. error (%) = , where n is the overall number of scored grades for the given species and p is the proportion of positively scored grades. The respective severity grades are shown in Figs 1 and 2. Numbers in brackets represent WNS pathology grade weighting—see text for details.