H. pyloriisolates obtained from culture (DNeasy UltraClean Microbial Kit, Qiagen, Hilden, Germany). The extraction procedures were performed in accordance with the manufacturer’s instructions.
b)
H. pyloriin the gastric biopsy specimens and to confirm the identification of the isolates recovered from the selective agar as
H. pyloriby phenotypic tests. For this purpose, primers (glmM-F 5’-AAGCTTTTAGGGGTGTTAGGGGTTT-3’ and glmM-R 5’-AAGCTTACTTTCTAACACTAAC GC-3’) specific to the phosphoglucosamine mutase (glmM) gene of
H. pyloriwere used, and the test was performed by a method of Lu et al. [18]. The amplification cycles consisted of denaturation at 93 °C for 1 min, primer annealing at 58 °C for 1 min, and extension at 72 °C for 1 min. Samples were amplified through 35 cycles. Amplified products were resolved by gel electrophoresis on 1.5% agarose (Biomax, Agarose, Lot no. 124543PR, from Prona, European Economic Community) and visualized under a UV transilluminator (G:BOX Chemi XRQ; Syngene, Cambridge, UK). Bands, which were 294-bp in size, were considered as a positive result.