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Extensively drug-resistant (XDR) Typhi has been reported in Sindh province of Pakistan since 2016. The potential for further spread is of serious concern as remaining treatment options are severely limited. We report the phenotypic and genotypic characterization of 27 XDR . Typhi isolated from patients attending Jinnah Hospital, Lahore, Pakistan. Isolates were identified by biochemical profiling; antimicrobial susceptibility was determined by a modified Kirby-Bauer method. These findings were confirmed using Illumina whole genome nucleotide sequence data. All sequences were compared to the outbreak strain from Southern Pakistan and typed using the . Typhi genotyping scheme. All isolates were confirmed by a sequence analysis to harbor an IncY plasmid and the CTX-M-15 ceftriaxone resistance determinant. All isolates were of the same genotypic background as the outbreak strain from Sindh province. We report the first emergence of XDR . Typhi in Punjab province of Pakistan confirmed by whole genome sequencing.
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http://dx.doi.org/10.3390/microorganisms8091336 | DOI Listing |
Trop Doct
September 2025
Consultant, Department of Internal Medicine, Indus Hospital and Health Network, Karachi, Pakistan.
Haemophagocytic lymphohistiocytosis (HLH) is a deadly hyper-inflammatory clinical response marked by excessive inflammation and tissue damage that can be secondarily triggered by infections, autoimmune and malignancy. HLH is usually caused by viruses and rarely by bacterial infections such as serovar Typhi. Its rising incidence of extended drug-resistant (XDR) in low-income countries such as Pakistan can lead to numerous complications but rarely secondary HLH.
View Article and Find Full Text PDFCurr Microbiol
August 2025
Department of Horticulture and Life Science, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
Salmonella typhi is a facultative anaerobic, rod-shaped, Gram-negative bacterium that causes typhoid fever, a potentially fatal systemic infection. This study aimed to characterize antibiotic susceptibility patterns, mutations at the molecular level, and efflux pump genes in clinical isolates. In this study, blood samples (n = 2950) were collected from suspected typhoid-infected patients, and 380 (12.
View Article and Find Full Text PDFPak J Pharm Sci
August 2025
Provincial Public Health Laboratory Balochistan, Pakistan.
Extensive drug resistance (XDR) S. typhi have been evaluated in patients with gastrointestinal disturbance who attended multiple tertiary care hospitals in Quetta, Balochistan, Pakistan. Blood samples of total of 480 patients were obtained and S.
View Article and Find Full Text PDFJ Biomol Struct Dyn
July 2025
Natural and Medical Sciences Research Center, University of Nizwa, Nizwa, Oman.
The widespread use of azithromycin during the COVID-19 pandemic has likely contributed to the increased resistance of to this antibiotic. This study focuses on the extensive drug resistance (XDR) of in Pakistan, analyzing 11,916 suspected typhoid fever cases, with 424 confirmed as and Paratyphi A. Through antimicrobial susceptibility tests and PCR-based Sanger sequencing, an R717L mutation in the gene was identified, signalling the emergence of azithromycin resistance.
View Article and Find Full Text PDFPathog Glob Health
June 2025
Department of Microbiology, University of Karachi, Karachi, Pakistan.
The drug-resistant strains of enterica serovar Typhi (. Typhi) are serious threats to health sectors worldwide. This study focuses on genomic characterization of environmentally derived an extensively drug resistant (XDR) strain of Typhi, highlighting its potential to cause significant outbreak.
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