REFERENCES
- Blaser MJ, Atherton JC. Helicobacter pylori persis-tence: biology and disease. J Clin Invest 2004; 113: 321–333.
- Van der Wouden EJ, de Jong A, Thijs JC, Kleibeuker JH, van Zwet AA. Subpopulations of Helicobacter pylori are responsible for discrepancies in the outcome of nitrimidazole suceptibility testing. Antimicrob Agents Chemother 1999; 43: 1484–1486.
- Weel J, van der Hulst R, Gerrits Y, Tytgat G, van der Ende A, Dankert J. Heterogeneity in susceptibility to metron-idazole among Helicobacter pylori isolates from patients with gastritis or peptic ulcer. J Clin Microbiol 1996; 34: 2158–2162.
- Jorgensen M, Daskalopopulos G, Warburton V, Mitchell H, Haze11 S. Multiple strain colonization and metronidazole resistance in Helicobacter pylori infected patients: identifica-tion from sequential and multiple biopsy specimens. J Infect Dis 1996; 174: 631–635.
- Ortiz Godoy A, Lima Ribeiro M, Borges Benvengo Y, Vitiello L, Miranda M, Mendonca S, Pedrazzoli Jr J. Analyis of antimicrobial susceptibility and virulence factors in Helicobacter pylori clinical isolates. BMC Gastroenterol 2003; 3: 20–25.
- van Doom L, Schneeberger P, Nouhan N, Plaisier A, Quint W, de Boer WA. Importance of Helicobacter pylori cagA and yacA status for the efficacy of antibiotic treatment. Gut 2000; 46: 321–326.
- Zschausch H, Han S, Meyer H, Maurer M. No associa-tion between Helicobacter pylori genotypes and antibiotic resistance phenotypes within families. Helicobacter 2002; 7: 364–366.
- van der Ende A, Rauws E, Feller M, Mulder C, Tytgat G, Dankert J. Heterogeneous H.pylori isolates from members of a family with history of a peptic ulcer disease. Gastroenterology 1996; 11: 638-647.
- Tomasini ML, Zanussi S, Sozzi M, Tedeschi R, Basaglia G, De Paoli P. Heterogeneity of cag genotypes in Helicobacter pylori isolates from human biopsies. J Clin Microbiol 2003; 41: 976–980.
- Piccolomini R, Di Bonaventura G, Catamo G, Carbone F, Neri M. Comparative evaluation of the E test, agar dilution and broth microdilution for testing susceptibilities of Helicobacter pylori strains to 20 antimicrobial agents. J Clin Microbiol 1997; 35: 1842–1846.
- National Committee for Clinical Laboratory Standards (NCCLS) 2000. Performance standards for antimicrobial sus-ceptibility testing. Tenth informational Supplement. NCCLS Document M100-S10 (M7), NCCLS, Wayne, PA
- Owen RJ. Molecular testing for antibiotic resistance in Helicobacter pylori. Gut 2002; 50: 285–289.