FIG 4.

PMA treatment results in significant effects on milk collected postpasteurization. (A) Weighted UniFrac distance between the PMA treated and untreated milk samples. (B) Bacterial cell counts (log₁₀ transformed) estimated by qPCR for PMA-treated (PMA) or untreated (no PMA) milk collected during the late summer. Significant differences between cell count estimates for PMA-treated and untreated samples were determined by the paired t test, assuming equal variance, and are indicated by asterisks. *, P < 0.05; **, P < 0.01.