Figure 1

Uptake and killing of Streptococcus uberis by host phagocytes. A Killing of S. uberis strains FSL Z1-048 and FSL Z1-124 by bovine monocyte derived macrophages. Data represent the percentage (±standard deviation) of bacteria that survived after 2 h of co-incubation with macrophages. Data were obtained using cells isolated from blood of 3 animals, tested individually, and the experiment was conducted twice. The p value for the t test is shown, calculated using 6 observations per strain with each observation based on the average of 3 wells. B Killing of S. uberis strains FSL Z1-048 and FSL Z1-124 by bovine polymorphonuclear cells (PMN). Data represent the percentage (±standard deviation) of bacteria that survived after 1.5 h of co-incubation with PMN. Data were obtained in one experiment using PMN from 4 animals, tested individually. The p value for the t test is shown, calculated using 4 observations per strain, with each observation based on the average of 3 wells.