FIG. 2.
Growth of B31-A in medium containing various amounts of chitobiose (chi) substituting for GlcNAc. Complete BSKII medium contains 1.8 mM GlcNAc. Bacteria were diluted to 105/ml, grown at 35°C in the indicated media, and enumerated daily using a Petroff-Hausser chamber and dark-field microscope.