Variant Analysis of XDR Salmonella Typhi Strains Using Global Alignment Tool Kit in South Asian Region

Abstract

Objective: To concisely compare genomic profiles of XDR Salmonella Typhi isolates from Lahore withantimicrobial-resistant Salmonella Typhi isolates from other developing nations.Study Design: Comparative analysis of whole genome sequences.Place and Duration of Study: The study was conducted from December 2020 to September 2021 at KauserAbdulla Malik (KAM) School Life Sciences, Forman Christian College University, Lahore, Pakistan.Methods: The Galaxy pipeline was run to obtain detailed information at the nucleotide level regardingmutations that lead to the emergence of XDR strains. Whole genome sequences were analyzed to compare thegenomes of selected three developing nations.Results: The Pakistani isolates had a significantly higher mutation rate, higher proportion of modifiers, andsilent mutations as compared to isolates of Bangladesh and India.Conclusion: Cases of Salmonella Typhi XDR are rapidly rising in Asian countries such as Pakistan, Bangladesh,and India emphasizing the need to analyze and compare its genome with relevant strains. Our study highlightsthe unique profile of the Lahore (Pakistan) isolate with the highest mutation rate suggesting the potentialregional differences in selective pressure. Further spotlights the necessity to elucidate the functionalconsequences of the identified mutations in S. Typhi isolates. How to cite this: Niaz M, Mumtaz Z, Ahmed M, Ahmad S, Ali A, Yousaf MZ. Variant Analysis of XDR Salmonella Typhi Strains Using Global Alignment Tool Kit in South Asian Region. Life and Science. 2024; 5(2): 244-250. doi: http://doi.org/10.37185/LnS.1.1.432