Table 5. Performance comparison of different feature selection methods on independent test set.

Species	Selection Methods	MCC	ACC	SEN	SPE	PRE	AUC
H. sapiens	MRMD	0.180	0.591	0.667	0.511	0.592	0.625
	mRMR	0.196	0.599	0.652	0.542	0.603	0.632
	MI	0.230	0.616	0.690	0.538	0.614	0.653
	PCC	0.257	0.629	0.696	0.558	0.626	0.657
M. musculus	MRMD	0.255	0.627	0.670	0.584	0.621	0.686
	mRMR	0.303	0.651	0.660	0.643	0.653	0.705
	MI	0.206	0.603	0.601	0.605	0.608	0.683
	PCC	0.314	0.657	0.648	0.665	0.663	0.713
E. coli	MRMD	0.394	0.696	0.745	0.647	0.679	0.698
	mRMR	0.257	0.627	0.686	0.569	0.614	0.689
	MI	0.137	0.569	0.608	0.529	0.564	0.598
	PCC	0.375	0.686	0.745	0.627	0.667	0.734
S. typhimurium	MRMD	0.062	0.530	0.640	0.420	0.525	0.561
	mRMR	-0.201	0.490	0.620	0.360	0.492	0.503
	MI	0.081	0.540	0.600	0.480	0.536	0.508
	PCC	0.040	0.520	0.560	0.480	0.519	0.542