title: Induction of prophages of enterohemorrhagic Escherichia coli O157:H7 with norfloxacin.
abstract: Norfloxacin (NFLX) caused induction of prophages VT1 and VT2 of enterohemorrhagic Escherichia coli O157 at subinhibitory concentrations. In time course experiments, we observed the following sequential events: upon induction, the phage genomes underwent multiplication; the amount of stx genes increased; and subsequently, large quantities of toxins VT1 and VT2 were produced. Further studies showed that the molecular mechanism of prophage induction is closely related to the RecA system since the prophage VT2 was not induced with NFLX in a recA mutant strain.
authors: The School of Biology-Oriented Science and Technology, Department of Molecular Genetics, Kinki University, Wakayama 649-6493, Osaka 565-0871, Japan.
authors: A
authors: A
authors: Matsushiro
authors: K
authors: K
authors: Sato
authors: H
authors: H
authors: Miyamoto
authors: T
authors: T
authors: Yamamura
authors: T
authors: T
authors: Honda
mesh_terms: D003090:Coliphages / Q000254:growth & development*; D019453:Escherichia coli O157 / Q000187:drug effects* / Q000378:metabolism / Q000821:virology*; D009643:Norfloxacin / Q000494:pharmacology*; D011938:Rec A Recombinases / Q000378:metabolism; D013997:Time Factors; D014775:Virus Activation
chemical_list: D011938:Rec A Recombinases; D009643:Norfloxacin