| molecular typing of enterohemorrhagic escherichia coli o157:h7 isolated in okayama prefecture using pulsed field gel electrophoresis and random amplification of polymorphic dna. | three outbreaks and many isolated cases of enterohemorrhagic escherichia coli o157:h7 occurred in 1996 and 1997 in okayama prefecture, japan. in an attempt to investigate the route of these infections, the strains isolated from the 3 outbreaks (total 33 strains) and 15 isolated cases (total 15 strains) were investigated using random amplification of polymorphic dna (rapd) and pulsed-field gel electrophoresis (pfge). in addition, 10 strains from an outbreak in tojo cho, hiroshima prefecture (june ... | 1999 | 10488407 |