Figure 7.

Impact of chemostat extract on V. cholerae growth and motility in vitro.

A. Cultures were grown in BHI broth with or without an extract from chemostat cultures at 37 °C and growth was measured by absorbance (OD₆₂₀) for 12 h in a microplate reader. Results represent the average of three independent measurements (n = 3), and bars show the standard errors of means. Circles indicate control cultures, whereas squares represent cultures containing the chemostat extract. B. BHI agar plates (0.3%) with or without the addition of the chemostat extract were inoculated with V. cholerae and incubated for 16 h. Motility zones were then measured (in mm). Results represent the average of twelve independent measurements (n = 12) and bars show the standard errors of means. **p< .01.