B. thailandensis infection and replication in tomato plantlets. Tomato plantlets were infected with B. thailandensis and monitored over a period of seven days. On day 7, representative photographs of the uninfected plantlets (A) and the infected plantlets (B) were taken. (C) Tomato plantlets infected with B. thailandensis were scored daily based on the extent of disease symptoms on an index from 1 - 5 over a period of seven days. The average score was calculated based on at least 100 plantlets cumulative from several experiments. (D) Each graph represents bacterial counts from leaves of one B. thailandensis infected plantlet over days 1, 3, 5 and 7. Each symbol L represents one leaf.