Table 2.

The total number of reads (‘total’) classified with CARMA3_BLASTx and the number of reads classified with the fall-back method (‘fall-back’)

	Total	Fall-back	Fall-back
			Single	Multiple
Order-filtered	13081	2668	1397	1271
Species-filtered	20172	1907	878	1029
All	22756	2203	1159	1044

‘Single’ represents the number of metagenomic reads that had only one BLAST hit and ‘Multiple’ represents the number of reads with two or more BLAST hits.