The gd mat on the fur of the bats should be expected to consist of

The Gd mat on the fur of the bats should be expected to consist of Hyphae. 
Although WNS is a disease of hibernating bats, severe wing damage due to fungal hyphae may be seen in bats that have recently emerged from hibernation. These recently emerged bats also have a robust suppurative inflammatory response.

The light is great source of energy