Figure 1.

Intraintestinal transduction of recipient strains. Donor V. cholerae strain LAC-1(pCTX-Kn) was mixed with each of the different V. cholerae recipient strains and then gastrointestinally inoculated into suckling mice. After 20 hr of intraintestinal growth, intestinal homogenates were plated to determine the total number of CFU of each recipient strain (solid bars) and the number of recipient cells that were transduced to Kn resistance by CTX-Knφ (hatched bars). There were at least eight mice in each group. For each group, the median number of CFU along with the range are depicted in the graph.