Occurrence of Multidrug Resistant Extended Spectrum Beta-Lactamase-Producing Bacteria on Iceberg Lettuce Retailed for Human Consumption

Figure 5

Pulsed field gel electrophoresis of clinical and environmental strains of K. pneumoniae. Strain HFH958 is an ESBL-positive clinical strain isolated from a wound; strain DMC1944 is an ESBL-positive clinical strain isolated from urine; strain T1 SHV is one of the ESBL-positive environmental strains discussed in this study; strain UM101 is an ESBL-negative clinical strain isolated from lungs; REF refers to the control strain K. pneumoniae ATCC 700603; strain HFH959 is an ESBL-positive clinical strain isolated from sputum; strain DMC1945 is an ESBL-positive clinical strain isolated from sputum; strain T5TEM is one of the ESBL-positive environmental strains discussed in this study; strain KPHFH is an ESBL-positive clinical strain; DMC1324 is an ESBL-negative clinical strain; UM102 is an ESBL-negative strain isolated from urine. All these K. pneumoniae strains were isolated in 2011.