PCR Based Detection of Phase Variable Genes in Pakistani Based Clinical Helicobacter pylori Strains

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Ahmad Sajjad; Ahmad Faisal; Rahman Faiz ur; KHAN SALMAN; Murad Waheed; Mughal Imran; Rahman Amjad ur; Khan Fida Muhammad; Khan Imad; Ahmad Hajra

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Journal: Jundishapur Journal of Microbiology Year:2016 | Volume:9 | Issue:7 Page(s): 0-0

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Title

PCR Based Detection of Phase Variable Genes in Pakistani Based Clinical Helicobacter pylori Strains

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Keywords

PCR

Phase-Variable Genes

Restriction Modification System

Helicobacter pylori

Abstract

Background: The distribution pattern of Phase-Variable Genes varies from strain to strain and from region to region. The present study was carried out to investigate the distribution pattern of Phase-Variable Genes within Pakistan-based Helicobacter pylori strains and to analyze and compare them with strains prevalent in other parts of the world. Objectives: To determine the distribution pattern of Phase-Variable Genes in H. pylori strains circulating in Pakistan. PatientsandMethods: Biopsy samples were collected from 85 symptomatic patients suffering from various upper gastrointestinal tract symptoms. The biopsy specimens were chopped, then inoculated on H. pylori-specific media and incubated in a Campylobacter Gas Generating kit. Positive isolates were furtherconfirmedvia stainingandbiochemical procedures. Primers were designed for five Phase-Variable Genes using OligoCalc, an oligonucleotide properties calculator (version 3. 26) according to parameters stipulated in the literature. Polymerase chain reaction (PCR) was performed on all positive isolates to determine the presence or absence of Phase-Variable Genes. Results: On culturing, the prevalence of H. pylori infections in the samples was 44. 7%. The prevalence was higher in females than in males, and it increased with age. PCR amplification revealed that the hsdR gene was present in 79% of samples, while the mod and -subunit genes were present in 16% and 30% of samples, respectively. The streptococcalMprotein gene was found in 79%, while the fliP gene was prevalent in 56%. Conclusions: The distribution patterns of Phase-Variable Genes in Pakistani H. pylori strains were found to be somewhat different. The dominant prevalence of the hsdR gene was an interesting finding, considering its role in bacterial defense in both micro-and macroenvironments.

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APA: Copy

Ahmad, Sajjad, Ahmad, Faisal, Rahman, Faiz ur, KHAN, SALMAN, Murad, Waheed, Mughal, Imran, Rahman, Amjad ur, Khan, Fida Muhammad, Khan, Imad, & Ahmad, Hajra. (2016). PCR Based Detection of Phase Variable Genes in Pakistani Based Clinical Helicobacter pylori Strains. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), 9(7), 0-0. SID. https://sid.ir/paper/317761/en

Vancouver: Copy

Ahmad Sajjad, Ahmad Faisal, Rahman Faiz ur, KHAN SALMAN, Murad Waheed, Mughal Imran, Rahman Amjad ur, Khan Fida Muhammad, Khan Imad, Ahmad Hajra. PCR Based Detection of Phase Variable Genes in Pakistani Based Clinical Helicobacter pylori Strains. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM)[Internet]. 2016;9(7):0-0. Available from: https://sid.ir/paper/317761/en

IEEE: Copy

Sajjad Ahmad, Faisal Ahmad, Faiz ur Rahman, SALMAN KHAN, Waheed Murad, Imran Mughal, Amjad ur Rahman, Fida Muhammad Khan, Imad Khan, and Hajra Ahmad, “PCR Based Detection of Phase Variable Genes in Pakistani Based Clinical Helicobacter pylori Strains,” JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), vol. 9, no. 7, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/317761/en

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