FIG 2.

Effects of heat shock on the viability and conjugation efficiency of C. jejuni NCTC 11168. (A) Viability of C. jejuni NCTC 11168 in response to different heat shock temperatures for different lengths of time (0 to 60 min). (B) Conjugation efficiency of C. jejuni NCTC 11168 in response to different heat shock temperatures for different lengths of time (0 to 60 min). NCTC 11168 recipient cells were not subjected to heat shock treatment (0 min) as a control. Each bar represents the mean from two independent experiments with duplicate measurements for each experiment. The error bars indicate the standard deviations. The value that was significantly different (P < 0.05) from the value for the untreated cells is indicated by an asterisk, and this heat shock treatment (50°C for 30 min) was used in subsequent experiments in this study.