Fig 10.

Survival rates of Pg83 and the ΔPG352 mutant. Two strains were coincubated with 25% fresh serum or heat-inactivated serum for 1 and 3 h. The survival rates were calculated as follows: the total numbers of colonies present in the samples treated with 25% serum divided by the total numbers of colonies in the samples treated with heat-inactivated serum. The results are expressed as the average survival rates of triplicates. The data were statistically analyzed by Student t test at P < 0.01.