Fig. 3.

Biofilm formation by two representative strains on cultured HEp-2 cells in flow-through chambers after 24 h incubation at 37 °C. (a) S. Typhimurium SL1344 H3 transformed with the fimH gene from S. Typhimurium 6704. (Fim⁺ MSHA⁺ and binds to HEp-2 cells). (b) S. Typhimurium SL1344 H3 transformed with the fimH gene from S. Anatum (Fim⁺ MSHA⁺ but does not bind to HEp-2 cells).