Table 8.

Chemical relatedness between electronic-nose VOC-profiles of P. subflavus bat whole-body headspace volatiles analyzed by 3-d PCA with pattern discrimination index.

Aroma Class 1 1	Aroma Class 2 1	PCA Plot Distance 2	PDI (%) 3
Healthy field bats	Pd-infected cave bats	14,021.01	69.83
	Healthy cave bats	7889.59	37.73
Pd-infected cave bats	Healthy cave bats	11,921.69	77.09

¹ Bat whole-body air sample types (aroma classes): Healthy field bats = physically active foraging bats with full-range of metabolic activities; Healthy cave bat = physically inactive, Pd-uninfected, torpid bats with greatly reduced physiological activity; Pd-infected cave bats = Pd-infected, WNS-symptomatic torpid bats with reduced physiologically activity, but more frequent arousal episodes due to dermatophytic, Pd-associated irritation. ² PCA distances indicate actual mapping distances between plot centers of aroma class data clusters defined by 3-d principal component analysis (PCA) aromaplot. ³ Pattern discrimination index (PDI) values indicate percentage differences in VOC-aroma profile chemical composition determined by pairwise comparisons of aroma class (sample types) based on PCA statistical tests of data derived from the e-nose multisensor array.