FIG. 4.

Coccoid cell formation and survival in C. coli exposed to air. Stationary-phase cells grown in BBFBP were diluted 1:20 in PBS and aerated at 37°C at 90 rpm. Viability (a) was determined at intervals for C. coli UA585 (○), C. coli NM3 (□), and C. coli SC4 (▴). The formation of coccoid cells (b) was determined at the same time for C. coli UA585 (●), C. coli NM3 (▪), and C. coli SC4 (▵). The curves show the data from a single experiment.