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Time to recovery of Mycobacterium avium subsp. paratuberculosis in raw milk spiked with 102 CFU/ml after decontamination with 0.75, 1.00, 1.25, and 1.50% hexadecylpyridinium chloride (HPC) for 5, 24, and 48 h in Bactec 12B medium. Data are expressed as means ± SEM. Significant differences between times of decontamination within an HPC concentration are represented by asterisks (* and **, P < 0.05).
