title: fecal sample from healthy traveler control: Sample S521
design: "16S rRNA V4 dual-index paired-end library. Forward primer GTGCCAGCMGCCGCGGTAA; Reverse primer GGACTACHVGGGTWTCTAAT. Method of Kozich, et al. 2013 PMC375397.  Library QC by Agilent Bioanalyzer. Library quantification and normalization by qPCR. Sequencing on MiSeq vers. 2x250 bp, 500 cycles. "