Influence of amplitude of ultrasonication on the lethality of MS treatment. (A) Survival curves of Y. enterocolitica corresponding to MS treatments (200 kPa, 30°C, 20 kHz) at the following amplitudes of ultrasonication: 21 (▪), 63 (•), 76 (▴), 117 (♦), and 150 (□) μm. (B) Relationship between amplitude of ultrasonication and lethality of MS treatments (log D).