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Background:  CYP2C19*2has been identified as the most common allelic variant of CYP2C19 affecting the response to Proton pump inhibitors (PPI). This study aims to detect CYP2C19*2allele in H. pylori-infected Sudanese population, owing its probable effect on H. pylori eradication.    Methods:  Antral biopsies was collected from 30 patients attending endoscopy units. Extraction of DNA was performed through QIAamp® DNA Mini Kit. Samples were screened for Urease C (UreC) gene of H. pylori using conventional PCR. Detection of CYP2C19*2 was performed in positive H. pylori samples using Real time-PCR.    Results:  The mean age of patients was 40.7 (±20.2 SE). Positive samples for UreC were 24 (80%) samples. Among them, four samples (16.6%) were found positive for CYP2C19*2 allele presence. Gender was found to be statistically associated with the presence of the allele ( p  &lt; 0.05).    Conclusion:  This study illustrates that CYP2C19*2 is of modest prevalence among H. pylori-infected Sudanese population. The determination of genotypic and allelic frequencies of CYP2C19 gene among different populations will provide data to be used to personalize treatment according to individual genetic profile, and minimize the possible adverse side effects of CYP2C19 substrates.

Detection of CYP2C19*2_ allele among Helicobacter pylori -infected patients in two tertiary hospitals of Khartoum, Sudan, 2019