Fig. 6From: Assessment of the influence of selected stress factors on the growth and survival of Listeria monocytogenesChange in the number of bacteria (relative to control variant) after exposure to cold stress in relation to the groups of origin of the strains. Boxplot: centre: median, box limits: 25th and 75th centiles, whiskers: minimum and maximum. a,b—values marked with different letters differ in a statistically significant way (p ≤ 0.05)Back to article page