Table 1. Total number of reads accumulated for each sample in the original data sets and after filtering and classification.

Sample	Original numberof reads	Number of reads afterpre-processing	Number of reads aftersub-sampling	Number of reads classifiedby Mothur
ICU	501707	95104 (18%)	95104 (18%)	95103 (18%)
Hall	346427	99952 (28%)	95104 (27%)	95071 (27%)