1. Back ground Antibiotics resistance of Helicobacter pylori, especially to clarithromycin is one of the main causes of failure of eradication. 23S rRNA point mutation of Helicobacter pylori is associated clarithromycin resistance 2. Hypothesis If the investigators check the 23S rRNA point mutation then choose treatment regimens containing a proton pump inhibitor and combination of two antibiotics (amoxicillin and clarithromycin or metronidazole), the investigators will eradicate Helicoabacter pylori more successfully 3. Material & methods The investigators enroll patients diagnosed with peptic ulcer, endoscopically. Helicobacter pylori is documented with Urea breath test or silver staining biopsy specimen or polymerase chain reaction of biopsy specimen. Check the 23S rRNA A2142G/A2143G point mutation by polymerase chain reaction. If there is mutation, the investigators consider as resistance to clarithromycin and choose the treatment regimen containing a proton pump inhibitor, amoxicillin, metronidazole. If there is no mutation, choose the treatment regimen containing a proton pump inhibitor, amoxicillin, clarithromycin. Verify Helicobacter pylori eradication by urea breath test. Compare eradication rate with conventional treatment,proton pump inhibitor, amoxicillin, clarithromycin.
Name: 23S rRNA point mutation test of Helicobacter pyloriDescription: mutation test group>> Helicobacter pylori polymerase chain reaction kit by dual-priming oligonucleotide-based multiplex polymerase chain reaction system before eradication of Helicobacter pylori at mutation test groupConventional Conventional AOC group, Conventional AOM group >> no interventionType: Procedure
Mutation test group
Name: UBT test & Gastroenterology with biopsy c silver stainDescription: UBT test & Gastroenterology with biopsy c silver stain due to indentify H. pylori infection Conventional AOM group, Conventional AOC group, Mutation test group >> interventionType: Procedure
Conventional AOC group Conventional AOM group Mutation test group
Description: Eradication was determined by the C13-urea breath test 6 to 8 weeks after the eradication therapy when PPIs had not been used for at least 2 weeks.Measure: Helicobacter Pylori Eradication Rate Time: 8 weeks
There is one SNP
Check the 23S rRNA A2142G/A2143G point mutation by polymerase chain reaction. --- A2143G ---