Authors :
Faiza Abdalla Sharif HajEdris; Sulieman Mohammed Elsanousi; Duaa Hajali Hajhamad Ibrahim; Magdi Babiker Omer Mohamed; Hussein Ali Ahmed Ghanim
Volume/Issue :
Volume 11 - 2026, Issue 7 - July
Google Scholar :
https://tinyurl.com/mtws77yw
Scribd :
https://tinyurl.com/mr3n5hvx
DOI :
https://doi.org/10.38124/ijisrt/26jul275
Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.
Abstract :
Shiga toxin-producing Escherichia coli (STEC) and extended-spectrum β-lactamase (ESBL)-producing strains
are a major threat to paediatric health, especially in resource-limited settings. The present study was conducted to
investigate the molecular characteristics of Shiga toxin genes (stx1 and stx2) and ESBL genes (blaCTX, blaTEM, blaSHV)
in Escherichia species isolated from children with diarrhea, Kassala State, Sudan. 2. A descriptive cross sectional study
was conducted from the year 2021-2024 among 404 children less than five years of age presenting with diarrhoea. Stool
specimens were cultured on MacConkey agar and E. coli isolates were identified by conventional microbiological
MicroScan system was used for determination of antimicrobial susceptibility. Multiplex PCR was used for the detection of
Shiga toxin genes (stx1, stx2) and extended spectrum beta-lactamase (ESBL) genes (blaCTX, blaTEM, blaSHV).
Keywords :
Escherichia Coli; Shiga Toxin; stx1; stx2; ESBL; Antimicrobial Resistance; Children; Sudan.
References :
- K. L. Kotloff et al., “Burden and aetiology of diarrhoeal disease in infants and young children in developing countries (the Global Enteric Multicenter Study, GEMS): a prospective, case-control study,” Lancet, vol. 382, no. 9888, pp. 209–222, 2013.
- J. M. Hunt, “Shiga toxin--producing Escherichia coli (STEC),” Clin. Lab. Med., vol. 30, no. 1, pp. 21–45, 2010.
- B. Pakbin, W. M. Brück, and J. W. A. Rossen, “Virulence Factors of Enteric Pathogenic Escherichia coli: A Review,” Int. J. Mol. Sci., vol. 22, 2021, [Online]. Available: https://api.semanticscholar.org/CorpusID:237489413
- L. Byrne, N. L. Adams, and C. Jenkins, “Association between Shiga Toxin–Producing Escherichia coli O157:H7 stx Gene Subtype and Disease Severity, England, 2009–2019,” Emerg. Infect. Dis., vol. 26, pp. 2394–2400, 2020, [Online]. Available: https://api.semanticscholar.org/CorpusID:221791777
- M. Castanheira, P. J. Simner, and P. A. Bradford, “Extended-spectrum β-lactamases: an update on their characteristics, epidemiology and detection,” JAC-Antimicrobial Resist., vol. 3, no. 3, p. dlab092, 2021, doi: 10.1093/jacamr/dlab092.
- K. Yu, Z. Huang, Y. Xiao, H. Gao, X. Bai, and D. Wang, “Global spread characteristics of CTX-M-type extended-spectrum β-lactamases: A genomic epidemiology analysis,” Drug Resist. Updat., vol. 73, p. 101036, 2024, doi: https://doi.org/10.1016/j.drup.2023.101036.
- T. A. Abdo Ahmad et al., “Comparative Genomic and Functional Characterization of Two Lytic Bacteriophages Against Antimicrobial-Resistant Escherichia coli,” Antibiotics, vol. 15, no. 6, 2026, doi: 10.3390/antibiotics15060563.
- M. H. Dirar, N. E. Bilal, M. E. Ibrahim, and M. E. Hamid, “Prevalence of extended-spectrum $β$-lactamase (ESBL) and molecular detection of blaTEM, blaSHV and blaCTX-M genotypes among Enterobacteriaceae isolates from patients in Khartoum, Sudan,” Pan Afr. Med. J., vol. 37, 2020, [Online]. Available: https://api.semanticscholar.org/CorpusID:229240703
- R. M. Humphries, A. M. Bobenchik, J. A. Hindler, and A. N. Schuetz, “Overview of Changes to the Clinical and Laboratory Standards Institute Performance Standards for Antimicrobial Susceptibility Testing, M100, 31st Edition,” J. Clin. Microbiol., vol. 59, 2021, [Online]. Available: https://api.semanticscholar.org/CorpusID:237607743
- X. Bai et al., “Comparative Genomics of Shiga Toxin-Producing Escherichia coli Strains Isolated from Pediatric Patients with and without Hemolytic Uremic Syndrome from 2000 to 2016 in Finland,” Microbiol. Spectr., vol. 10, 2022, [Online]. Available: https://api.semanticscholar.org/CorpusID:249924018
- Z. Mottaghiyan, D. Esmaeili, M. H. Ahmadi, and Niakan, “Development of a Multiplex PCR Assay for the Detection of Extended-Spectrum Beta-Lactamase Genes in Acinetobacter Baumannii Isolates in Tehran City, Iran,” Indian J. Microbiol., pp. 1–7, 2024, [Online]. Available: https://api.semanticscholar.org/CorpusID:266743914
- R. Bashir, N. Zaib, I. Altaf, F. Saleem, Q. Sultana, and S. Naz, “Optimization of PCR for rapid detection of CTX-M gene in ESBL producing Klebsiella pneumoniae clinical isolates from Punjab, Pakistan,” Malays. J. Microbiol., 2016, [Online]. Available: https://api.semanticscholar.org/CorpusID:53547175
- A. Muhummed et al., “Fecal carriage of ESBL-producing E. coli and genetic characterization in rural children and livestock in the Somali region, Ethiopia: a one health approach. Antimicrob Resist Infect Control [Internet]. 2024 Dec 18 [cited 2025 Jul 22]; 13 (1).”
- M. G. Tellevik, B. Blomberg, Ø. Kommedal, S. Y. Maselle, N. Langeland, and S. J. Moyo, “High Prevalence of Faecal Carriage of ESBL-Producing Enterobacteriaceae among Children in Dar es Salaam, Tanzania,” PLoS One, vol. 11, 2016, [Online]. Available: https://api.semanticscholar.org/CorpusID:15273558
- P. Hart, A. Bowitch, A. Mellmann, D. M. Ferkey, and G. B. Koudelka, “Factors Governing the Cross-Species Virulence of Shiga Toxin-Producing Escherichia coli,” Pathogens, vol. 15, no. 4, 2026, doi: 10.3390/pathogens15040353.
- X. Wang et al., “A Comprehensive Review on Shiga Toxin Subtypes and Their Niche-Related Distribution Characteristics in Shiga-Toxin-Producing E. coli and Other Bacterial Hosts,” Microorganisms, vol. 12, no. 4, 2024, doi: 10.3390/microorganisms12040687.
- M. E. Macha et al., “High prevalence of fecal carriage of extended-spectrum beta-lactamase producing Enterobacterales among patients with urinary tract infections in rural Tanzania,” Front. Microbiol., vol. 15, p. 1517182, 2025.
- M. Tigabie, A. Birhanu, M. Assefa, G. Girmay, and K. Tadesse, “Extended-spectrum $β$-lactamase-producing Enterobacterales among people living with human immunodeficiency virus across the globe: A systematic review and meta-analysis,” PLoS One, vol. 20, no. 6, p. e0321873, 2025.
- D. Wolde et al., “Antimicrobial susceptibility and characterization of extended-spectrum $β$-lactamase-producing Escherichia coli isolated from stools of primary healthcare patients in Ethiopia,” Antibiotics, vol. 13, no. 1, p. 93, 2024.
- N. Letara et al., “Prevalence and patient related factors associated with Extended-Spectrum Beta-Lactamase producing Escherichia coli and Klebsiella pneumoniae carriage and infection among pediatric patients in Tanzania,” Sci. Rep., vol. 11, no. 1, p. 22759, 2021.
- A. Azzam, H. Khaled, D. Samer, and W. M. Nageeb, “Prevalence and molecular characterization of ESBL-producing Enterobacteriaceae in Egypt : a systematic review and meta- analysis of hospital and community-acquired infections,” Antimicrob. Resist. Infect. Control, 2024.
- K. Bush and P. A. Bradford, “Epidemiology of β-Lactamase-Producing Pathogens,” Clin. Microbiol. Rev., vol. 33, no. 2, pp. 10.1128/cmr.00047-19, 2020, doi: 10.1128/cmr.00047-19.
- D. Abera et al., “High prevalence of colonization with extended-spectrum $β$-lactamase-producing and multidrug-resistant Enterobacterales in the community in Addis Ababa Ethiopia: risk factors, carbapenem resistance, and molecular characterization,” BMC Microbiol., vol. 24, no. 1, p. 402, 2024.
- S. Lipworth et al., “Ten-year longitudinal molecular epidemiology study of Escherichia coli and Klebsiella species bloodstream infections in Oxfordshire, UK,” Genome Med., vol. 13, no. 1, p. 144, 2021.
- L. L. Nesse, A. M. Osland, B. Asal, and S. S. Mo, “Evolution of antimicrobial resistance in E. coli biofilm treated with high doses of ciprofloxacin,” Front. Microbiol., vol. 14, p. 1246895, 2023.
- K. Juraschek et al., “Characterization of qnrB-carrying plasmids from ESBL-and non-ESBL-producing Escherichia coli,” BMC Genomics, vol. 23, no. 1, p. 365, 2022.
- W. C. Shropshire et al., “Systematic analysis of mobile genetic elements mediating $β$-lactamase gene amplification in noncarbapenemase-producing carbapenem-resistant enterobacterales bloodstream infections,” Msystems, vol. 7, no. 5, pp. e00476--22, 2022.
- Y. J. Hu, A. Ogyu, B. J. Cowling, K. Fukuda, and H. H. Pang, “Available evidence of antibiotic resistance from extended-spectrum $β$-lactamase-producing Enterobacteriaceae in paediatric patients in 20 countries: a systematic review and meta-analysis,” Bull. World Health Organ., vol. 97, no. 7, p. 486, 2019.
- A. Husna et al., “Extended-spectrum $β$-lactamases (ESBL): challenges and opportunities,” Biomedicines, vol. 11, no. 11, p. 2937, 2023.
- E. Foster-nyarko, “The microbial ecology of Escherichia coli in the vertebrate gut,” no. February, pp. 1–22, 2022, doi: 10.1093/femsre/fuac008.
- V. M. Sora, G. Meroni, A. Zecconi, P. A. Martino, A. Soggiu, and L. Bonizzi, “Extraintestinal Pathogenic Escherichia coli : Virulence Factors and Antibiotic Resistance,” 2021.
Shiga toxin-producing Escherichia coli (STEC) and extended-spectrum β-lactamase (ESBL)-producing strains
are a major threat to paediatric health, especially in resource-limited settings. The present study was conducted to
investigate the molecular characteristics of Shiga toxin genes (stx1 and stx2) and ESBL genes (blaCTX, blaTEM, blaSHV)
in Escherichia species isolated from children with diarrhea, Kassala State, Sudan. 2. A descriptive cross sectional study
was conducted from the year 2021-2024 among 404 children less than five years of age presenting with diarrhoea. Stool
specimens were cultured on MacConkey agar and E. coli isolates were identified by conventional microbiological
MicroScan system was used for determination of antimicrobial susceptibility. Multiplex PCR was used for the detection of
Shiga toxin genes (stx1, stx2) and extended spectrum beta-lactamase (ESBL) genes (blaCTX, blaTEM, blaSHV).
Keywords :
Escherichia Coli; Shiga Toxin; stx1; stx2; ESBL; Antimicrobial Resistance; Children; Sudan.