1.Linder, JA, Huang, ES, Steinman, MA, Gonzales, R, Stafford, RS. Fluoroquinolone prescribing in the United States: 1995 to 2002. Am J Med 2005;118:259–268.
2.Lautenbach, E, Strom, BL, Nachamkin, I, et al.Longitudinal trends in fluoroquinolone resistance among Enterobacteriaceae isolates from inpatients and outpatients, 1989–2000: differences in the emergence and epidemiology of resistance across organisms. Clin Infect Dis 2004;38:655–662.
3.Camins, BC, Marschall, J, DeVader, SR, Maker, DE, Hoffman, MW, Fraser, VJ. The clinical impact of fluoroquinolone resistance in patients with E. coli bacteremia. J Hosp Med 2011;6:344–349.
4.Lautenbach, E, Metlay, JP, Bilker, WB, Edelstein, PH, Fishman, NO. Association between fluoroquinolone resistance and mortality in Escherichia coli and Klebsiella pneumoniae infections the role of inadequate empirical antimicrobial therapy. Clin Infect Dis 2005;41:923–929.
5.Chang, TM, Lu, PL, Li, HH, Chang, CY, Chen, TC, Chang, LL. Characterization of fluoroquinolone resistance mechanisms and their correlation with the degree of resistance to clinically used fluoroquinolones among Escherichia coli isolates. J Chemother 2007;19:488–494.
6.Singh, R, Swick, MC, Ledesma, KR, et al.Temporal interplay between efflux pumps and target mutations in development of antibiotic resistance in Escherichia coli. Antimicrob Agents Chemother 2012;56:1680–1685.
7.Kern, WV, Oethinger, M, Jellen-Ritter, AS, Levy, SB. Non-target gene mutations in the development of fluoroquinolone resistance in Escherichia coli. Antimicrob Agents Chemother 2000;44: 814–820.
8.Donskey, CJ. Antibiotic regimens and intestinal colonization with antibiotic-resistant gram-negative bacilli. Clin Infect Dis 2006;43(suppl 2):S62–S69.
9.Richard, P, Delangle, MH, Raffi, F, Espaze, E, Richet, H. Impact of fluoroquinolone administration on the emergence of fluoroquinolone-resistant gram-negative bacilli from gastrointestinal flora. Clin Infect Dis 2001;32:162–166.
10.Lautenbach, E, Fishman, NO, Bilker, WB, et al.Risk factors for fluoroquinolone resistance in nosocomial Escherichia coli and Klebsiella pneumoniae infections. Arch Intern Med 2002;162:2469–2477.
11.Johnson, L, Sabel, A, Burman, WJ, et al.Emergence of fluoroquinolone resistance in outpatient urinary Escherichia coli isolates. Am J Med 2008;121:876–884.
12.van der Starre, WE, van Nieuwkoop, C, Paltansing, S, et al.Risk factors for fluoroquinolone-resistant Escherichia coli in adults with community-onset febrile urinary tract infection. J Antimicrob Chemother 2011;66:650–656.
13.Huotari, K, Tarkka, E, Valtonen, V, Kolho, E. Incidence and risk factors for nosocomial infections caused by fluoroquinolone-resistant Escherichia coli. Eur J Clin Microbiol Infect Dis 2003;22:492–495.
14.Lin, CY, Huang, SH, Chen, TC, Lu, PL, Lin, WR, Chen, YH. Risk factors of ciprofloxacin resistance in urinary Escherichia coli isolates. J Microbiol Immunol Infect 2008;41:325–331.
15.Arslan, H, Azap, OK, Ergonul, O, Timurkaynak, F. Risk factors for ciprofloxacin resistance among Escherichia coli strains isolated from community-acquired urinary tract infections in Turkey. J Antimicrob Chemother 2005;56:914–918.
16.Ortega, M, Marco, F, Soriano, A, et al.Analysis of 4758 Escherichia coli bacteraemia episodes: predictive factors for isolation of an antibiotic-resistant strain and their impact on the outcome. J Antimicrob Chemother 2009;63:568–574.
17.Colodner, R, Kometiani, I, Chazan, B, Raz, R. Risk factors for community-acquired urinary tract infection due to quinolone-resistant E. coli. Infection 2008;36:41–45.
18.McDonald, LC, Chen, FJ, Lo, HJ, et al.Emergence of reduced susceptibility and resistance to fluoroquinolones in Escherichia coli in Taiwan and contributions of distinct selective pressures. Antimicrob Agents Chemother 2001;45:3084–3091.
19.Killgore, KM, March, KL, Guglielmo, BJ. Risk factors for community-acquired ciprofloxacin-resistant Escherichia coli urinary tract infection. Ann Pharmacother 2004;38:1148–1152.
20.Lautenbach, E, Metlay, JP, Weiner, MG, et al.Gastrointestinal tract colonization with fluoroquinolone-resistant Escherichia coli in hospitalized patients: changes over time in risk factors for resistance. Infect Control Hosp Epidemiol 2009;30:18–24.
21.de Lastours, V, Chau, F, Tubach, F, Pasquet, B, Ruppe, E, Fantin, B. Independent behavior of commensal flora for carriage of fluoroquinolone-resistant bacteria in patients at admission. Antimicrob Agents Chemother 2010;54:5193–5200.
22.Hota, BN, Pur, S, Phillips, L, Weinstein, RA, Segreti, J. Impact of a fluoroquinolone formulary change on acquisition of quinolone-resistant gram-negative bacilli. Eur J Clin Microbiol Infect Dis 2005;24:405–410.
23.Yagci, D, Yoruk, F, Azap, A, Memikoglu, O. Prevalence and risk factors for selection of quinolone-resistant Escherichia coli strains in fecal flora of patients receiving quinolone therapy. Antimicrob Agents Chemother 2009;53:1287–1289.
24.Perea, S, Hidalgo, M, Arcediano, A, et al.Incidence and clinical impact of fluoroquinolone-resistant Escherichia coli in the faecal flora of cancer patients treated with high dose chemotherapy and ciprofloxacin prophylaxis. J Antimicrob Chemother 1999;44:117–120.
25.Lautenbach, E, Fishman, NO, Metlay, JP, et al.Phenotypic and genotypic characterization of fecal Escherichia coli isolates with decreased susceptibility to fluoroquinolones: results from a large hospital-based surveillance initiative. J Infect Dis 2006;194:79–85.
26.Gales, AC, Gordon, KA, Wilke, WW, Pfaller, MA, Jones, RN. Occurrence of single-point gyrA mutations among ciprofloxacin-susceptible Escherichia coli isolates causing urinary tract infections in Latin America. Diagn Microbiol Infect Dis 2000;36:61–64.
27.Lee, I, Fishman, NO, Zaoutis, TE, et al.Risk factors for fluconazole-resistant Candida glabrata bloodstream infections. Arch Intern Med 2009;169:379–383.
28.Barton, TD, Fishman, NO, Weiner, MG, LaRosa, LA, Lautenbach, E. High rate of coadministration of di- or tri-valent cation-containing compounds with oral fluoroquinolones: risk factors and potential implications. Infect Control Hosp Epidemiol 2005;26:93–99.
29.Mickey, RM, Greenland, S. The impact of confounder selection criteria on effect estimation. Am J Epidemiol 1989;129:125–137.
30.Han, JH, Nachamkin, I, Tolomeo, P, Mao, X, Bilker, WB, Lautenbach, E. Temporal changes in resistance mechanisms in colonizing Escherichia coli isolates with reduced susceptibility to fluoroquinolones. Diagn Microbiol Infect Dis 2013;76:491–496.
31.Hyle, EP, Bilker, WB, Gasink, LB, Lautenbach, E. Impact of different methods for describing the extent of prior antibiotic exposure on the association between antibiotic use and antibiotic-resistant infection. Infect Control Hosp Epidemiol 2007;28:647–654.
32.Keeney, D, Ruzin, A, McAleese, F, Murphy, E, Bradford, PA. MarA-mediated overexpression of the AcrAB efflux pump results in decreased susceptibility to tigecycline in Escherichia coli. J Antimicrob Chemother 2008;61:46–53.
33.Swick, MC, Morgan-Linnell, SK, Carlson, KM, Zechiedrich, L. Expression of multidrug efflux pump genes acrAB-tolC, mdfA, and norE in Escherichia coli clinical isolates as a function of fluoroquinolone and multidrug resistance. Antimicrob Agents Chemother 2011;55:921–924.
34.Sahm, DF, Critchley, IA, Kelly, LJ, et al.Evaluation of current activities of fluoroquinolones against gram-negative bacilli using centralized in vitro testing and electronic surveillance. Antimicrob Agents Chemother 2001;45:267–274.
35.Han, JH, Nachamkin, I, Tolomeo, P, Mao, X, Bilker, WB, Lautenbach, E. Risk factors for efflux pump overexpression in fluoroquinolone-resistant Escherichia coli. J Infect Dis 2012;206:1597–1603.
36.Bolon, MK, Wright, SB, Gold, HS, Carmeli, Y. The magnitude of the association between fluoroquinolone use and quinolone-resistant Escherichia coli and Klebsiella pneumoniae may be lower than previously reported. Antimicrob Agents Chemother 2004;48:1934–1940.