Reduced Fluoroquinolone Susceptibility in Salmonella enterica Isolates from Travelers, Finland
Marianne M. Lindgren , Pirkko Kotilainen, Pentti Huovinen, Saija Hurme, Susanna Lukinmaa, Mark A. Webber, Laura J.V. Piddock, Anja Siitonen, and Antti J. Hakanen
Author affiliations: National Institute of Health and Welfare, Turku, Finland (M.M. Lindgren, P. Kotilainen, P. Huovinen, A.J. Hakanen); Turku University Hospital, Turku (P. Kotilainen, A.J. Hakanen); University of Turku, Turku (S. Hurme); National Institute of Health and Welfare, Helsinki, Finland (S. Lukinmaa, A. Siitonen); University of Birmingham, Birmingham, UK (M.A. Webber, L.J.V. Piddock)
Figure 1. Ciprofloxacin susceptibility and quinolone resistance in 227 Salmonellaenterica isolates collected from travelers returning to Finland from Thailand or Malaysia, 2003–2007. A) Percentage of isolates showing reduced ciprofloxacin susceptibility (black bars, MIC >0.125 µg/mL, p = 0.002). B) Percentage of isolates showing conventional (black bars, MIC of nalidixic acid >32 µg/mL, p = 0.0014) or nonclassical (white bars, MIC of nalidixic acid <32 µg/mL, p = 0.878) quinolone resistance phenotype.
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