Fig. 3.

Distinct sets of hyperabundant strains are observed in each lymph node. Heat map of the abundance of 160 barcodes that represent more than 2% of reads in at least one sample. Each row is a sample, each column represents a hyperabundant barcode (i.e., strain), and gray scale intensity indicates fractional abundance of each barcode in each sample. Empty squares indicate barcodes that were not detected in a sample. Horizontal lines separate samples from each animal. Note that the PCR amplification of barcodes from calf 4, left parotid, quadrant A was contaminated with template from calf 1, left parotid, quadrant B. This signal is detected in the abundance data from the calf 4 Left_A sample.