Salmonella enterica serovar Typhi in Japan, 2001-2006: emergence of high-level fluoroquinolone-resistant strains

Epidemiol Infect. 2010 Mar;138(3):318-21. doi: 10.1017/S0950268809990380. Epub 2009 Jul 27.

Abstract

The phage types and antimicrobial susceptibilities of 226 isolates of Salmonella enterica serovar Typhi from imported cases in Japan between 2001 and 2006 were investigated. Most (93.8%) had travelled to Asian countries, particularly South East Asia. Twenty-one phage types were identified with E1 (30.5%), UVS (15.9%) and B1 (9.3%) being the most common. The frequency of multidrug-resistant strains reached 37.0% in 2006 with phage types E1 and E9 predominating. Almost half (48.2%) of the isolates were resistant to nalidixic acid and two isolates displayed high-level fluoroquinolone resistance. Three mutations, two in gyrA and one in parC, were identified in both isolates.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents / pharmacology*
  • Drug Resistance, Bacterial*
  • Electrophoresis, Gel, Pulsed-Field
  • Fluoroquinolones / pharmacology*
  • Genotype
  • Humans
  • Microbial Sensitivity Tests
  • Salmonella Infections / epidemiology*
  • Salmonella Infections / microbiology*
  • Salmonella typhi / drug effects*

Substances

  • Anti-Bacterial Agents
  • Fluoroquinolones