Table 1.

Characterization of H. pylori isolates from antrum and corpus biopsy specimens

H. pylori strain designationaPresence (+) or absence (−) of:Susceptibility to metronidazole (MIC, μg/ml)bPatient history
vacAcagAChronic active gastritisPeptic ulcers, past or present
Mz1a++4YesYes
Mz1c++>32YesYes
Mz2a++>32YesYes
Mz3a++0.75YesNo
Mz4a++2YesYes
Mz5a++0.047YesNo
Mz6a++>32YesYes
Mz6c++6YesYes
Mz7a++1.5YesNo
Mz7c++6YesNo
Mz8a++0.25YesNo
Mz9a++0.5YesYes
Mz9c++0.25YesYes
Mz10a++ NDc YesYes
Mz11a++1YesYes
Mz11c++1.5YesYes
Mz12a++3YesNo
Mz13a++3YesNo
Mz13c++3YesNo
Mz14a+>32 (>32)d YesNo
Mz14c+0.125 (0.19)d YesNo
Mz15a++0.25YesYes
Mz15c++0.19YesYes
Mz16a++0.047YesNo
Mz17a++>32YesNo
Mz17c++3YesNo
Mz18a++NDNoNo
Mz19a++>32YesNo
Mz20a++NDYesNo
Mz20c++NDYesNo
Mz21a++>32YesYes
Mz21c++>32YesYes
Mz22a++0.75YesYes
Mz22c++1YesYes
Mz23a++NDYesNo
Mz23c++NDYesNo
Mz24a++>32YesNo
Mz24c++4YesNo
Mz25a++3YesNo
Mz25c++4YesNo
Mz26a++4YesYes
Mz27a++2YesYes
Mz28a++0.064YesNo
Mz29a++>32YesNo
Mz30a++0.125YesYes
  • a Strains whose designations end in “a” are antrum isolates, while those ending in “c” are corpus isolates.

  • b As determined by E test (AB Biodisk, Solna, Sweden). The H. pylori colonies, dissolved in phosphate-buffered saline, were inoculated onto Mueller-Hinton agar (Oxoid) supplemented with 5% human erythrocytes. The MICs were determined after a 72-h incubation.

  • c ND, not determined.

  • d Repeated result in parentheses.