| molecular biology of extended-spectrum beta-lactamase-producing enterobacteriaceae responsible for digestive tract colonization. | twenty-nine extended-spectrum beta-lactamase (esbl)-producing enterobacteriaceae strains (14 klebsiella pneumoniae, 10 escherichia coli and five citrobacter diversus) isolated from april to july 1996 from faecal carriers in a surgical intensive care unit at the university hospital of casablanca (morocco) were studied. plasmid content and dna macrorestriction polymorphism determined by pulsed-field gel electrophoresis (pfge) were used to compare the strains. restriction profiles of total genomic ... | 2004 | 15236848 |