PFGE patterns of K. pneumoniae strains carrying blaCTX-M genes. Lanes 1 to 13, Kp19, Kp20, Kp65, Kp18, Kp15, Kp61, Kp67, Kp62, Kp69, Kp13, Kp14, Kp56, and Kp30 corresponding to molecular types K1, K4, K4, K9, K6, K4, K4, K4, K4, K3, K7, K1, and K4, respectively.