Open research questions in Escherichia coli research studies

What the literature leaves open

• There is a need to understand the main virulence genes and pathogenicity mechanisms of Escherichia coli that predominate in animal production environments. There is a need to identify the main virulence factors associated with disease generation in animal production environments.

  Factores de virulencia y patogenicidad de Escherichia coli en ambientes de producción animal: implicaciones para la salud y la productividad · 2026 · DOI

• The study identifies a gap in the understanding of antimicrobial resistance and virulence genes of E. coli isolated from clinical mastitis in dairy cattle.

  Antimicrobial Resistance and Virulence Genes of Escherichia coli Isolated in a Large-Scale Dairy Farm from Clinical Mastitis in Southern Xinjiang, China · 2026 · DOI

• There is a need to understand the genetic elements that contribute to the spread of antimicrobial resistance. There is a lack of knowledge on the co-occurrence of antimicrobial resistance and virulence genes in Escherichia coli from dairy farm waste.

  Co-occurrence of Antimicrobial Resistance and Virulence Genes on Diverse Mobilomes in Dairy Farm Waste Escherichia coli: a Genomic Analysis · 2026 · DOI

• Microbial contamination of surface water sources. The need for accurate and efficient detection methods for E. coli. The complexity of E. coli's genetic diversity and its implications for detection and identification.

  The Genetic Role of Escherichia Coli in Surface Water Quality Monitoring: A Molecular Review · 2026 · DOI

• The challenges include the spread of AMR in wildlife and the lack of data on the occurrence of 3GCR-E. coli in European hedgehogs. The challenges also include the management of AMR in veterinary and human medicine.

  Occurrence of third-generation cephalosporin-resistant Escherichia coli in European hedgehogs (Erinaceus europaeus) from a wildlife rescue centre in Lombardy, Northern Italy · 2026 · DOI

• The potential for incorrect attribution of isolates to clusters using FTIR. The need for more advanced bioinformatic tools for the analysis of FTIR data. The limited availability of reference data for Serratia spp. isolates.

  Evaluation of Fourier transform infrared spectroscopy as a first-line surveillance typing tool for Serratia spp. isolates derived from clinical materials · 2026 · DOI

• Antimicrobial resistance is a concern, with 54.3% of isolates resistant to at least one antimicrobial. The complex problem of STEC in dairy systems requires a One Health approach. The economic costs of STEC infections are significant and need to be analyzed comprehensively.

  Endocrine-Disrupting Chemicals in Cosmetics: Mechanisms, Health Impacts, and Pharmaceutical Approaches for Safer Formulations · 2026 · DOI

• The ability of E. coli to adhere to device surfaces and form biofilms. The development of antimicrobial resistance. The need for effective infection prevention and control measures.

  Device-Associated Infections Caused by <i>Escherichia coli</i> in Hospitalized Patients: Mechanisms and Clinical Impact · 2026 · DOI

• The increasing prevalence of multidrug-resistant UPEC strains. The dissemination of resistance genes through mobile genetic elements (MGEs). The need for effective treatment strategies for recurrent UTIs.

  Whole-genome characterisation of high-risk ST131 and the emerging ST1193 UPEC lineages in Romanian patients with recurrent urinary tract infections · 2026 · DOI

• Further studies are needed to investigate the epidemiology of UPEC and the dissemination of resistance genes. The development of effective treatment strategies for recurrent UTIs requires continued research into the population structure and antimicrobial resistance of UPEC isolates.

  Whole-genome characterisation of high-risk ST131 and the emerging ST1193 UPEC lineages in Romanian patients with recurrent urinary tract infections · 2026 · DOI

• The growing scale of livestock production and frequent use of antibiotics in animal farming have accelerated the emergence and spread of multidrug-resistant E. coli. The transmission and spread of multidrug-resistant E. coli in livestock production is not well understood. There is a need to develop strategies to prevent and control the spread of multidrug-resistant E. coli.

  Isolation and Whole-Genome Analysis of Multidrug-Resistant Escherichia coli from Diarrheic Fecal Samples in a Sheep Farm in Ningxia, China · 2026 · DOI

• Public pathogen-genomics repositories are increasingly used for antimicrobial resistance (AMR) surveillance, yet the reliability and interoperability of database-derived genotype–phenotype inference remain incompletely characterized.

  Antibiotic-Specific Genotype–Phenotype Concordance and Cross-Database Interoperability in Public Escherichia coli/Shigella WGS-AMR Metadata · 2026 · DOI

• However, comprehensive data on the molecular characterization of these resistance determinants from clinical wastewater in southeastern Nigeria remain scarce.

  High-Risk Extended-Spectrum Beta-Lactamase (blaTEM) and Metallo-Beta-Lactamase (blaNDM) Genes in Escherichia coli from Clinical Wastewater from a Nigerian Teaching Hospital: A One Health Perspective · 2026 · DOI

• The paper does not mention specific limitations of the study. However, it is implied that the development of effective vaccines is a complex task requiring further research.

  Research progress on multivalent genetically engineered vaccines against enterotoxigenic Escherichia coli · 2026 · DOI

• Further research is needed to develop more effective vaccines against ETEC. The use of genetic engineering techniques could lead to the creation of more effective vaccines. The exploration of novel live-vector delivery systems could provide new avenues for vaccine development.

  Research progress on multivalent genetically engineered vaccines against enterotoxigenic Escherichia coli · 2026 · DOI

• In conclusion, FUT1 genetic polymorphisms G/G and G/A can increase susceptibility to F18 ETEC infection, warranting further investigation into interactions with other intestinal microbes, and representing a promising target for genetic selection.

  Short Communication: <i>FUT1</i> genetic polymorphism influences susceptibility to F18 enterotoxigenic <i>Escherichia coli</i> infection in pigs · 2026 · DOI

• A major strength of this study was the combined evaluation of prevalence, virulence-associated genes, phenotypic antimicrobial susceptibility, and molecular determinants of resistance during the quarantine stage of international livestock trade, a critical yet underexplored point in pathogen surveillance.

  Prevalence, virulence profiling, and latent antimicrobial resistance determinants of Escherichia coli O157:H7 in imported Australian beef cattle during quarantine in Indonesia · 2026 · DOI

• Further studies can investigate the application of molecular detection methods in water monitoring systems. The development of more effective water monitoring systems can be informed by the study's findings.

  The Genetic Role of Escherichia Coli in Surface Water Quality Monitoring: A Molecular Review · 2026 · DOI

• Genomic sampling was limited to one endpoint representative per exposure zone. No transcriptomic or functional assays were performed. The study cannot exclude broader regulatory adaptation or efflux-related responses.

  Experimental evolution under colistin selection increases colistin minimum inhibitory concentration (MIC) without detectable collateral MIC shifts in Escherichia coli ATCC 25922 · 2026 · DOI

• Future research should investigate the occurrence of 3GCR-E. coli in other wildlife species. Future research should also investigate the factors contributing to the spread of AMR in wildlife.

  Occurrence of third-generation cephalosporin-resistant Escherichia coli in European hedgehogs (Erinaceus europaeus) from a wildlife rescue centre in Lombardy, Northern Italy · 2026 · DOI

• The emergence and spread of multidrug-resistant E. coli in livestock production is a major health issue. There is a need to investigate the whole-genome analysis of multidrug-resistant E. coli from diarrheic fecal samples in a sheep farm in Ningxia, China.

  Isolation and Whole-Genome Analysis of Multidrug-Resistant Escherichia coli from Diarrheic Fecal Samples in a Sheep Farm in Ningxia, China · 2026 · DOI

• The transmission dynamics and genomic characteristics of blaCTX-M and blaNDM-positive Escherichia coli strains isolated from farm workers and pigs are not well understood. The role of horizontal gene transfer in the dissemination of antimicrobial resistance genes is not fully elucidated.

  Horizontal gene transfer facilitates the dissemination of blaCTX-M and blaNDM in Escherichia coli isolates from humans and pigs in Sichuan Province, China · 2026 · DOI

• The relationship between transcriptional activity and actual metabolic flux remains to be experimentally validated. The study only investigated the transcriptional changes of APEC in infected chicken embryos and did not examine other aspects of the infection process.

  Transcriptional changes related to metabolic and iron acquisition strategies of avian pathogenic Escherichia coli are associated with embryonic survival during yolk sac infection · 2026 · DOI

• Further studies are needed to experimentally validate the relationship between transcriptional activity and actual metabolic flux. Research is needed to develop effective vaccination strategies against APEC. Studies are needed to investigate the transcriptional profiles of E. coli in different environments and to develop novel therapeutic strategies.

  Transcriptional changes related to metabolic and iron acquisition strategies of avian pathogenic Escherichia coli are associated with embryonic survival during yolk sac infection · 2026 · DOI

• There is a need for a rapid and cost-effective method for typing Serratia spp. isolates. Current methods, such as WGS, are time-consuming and expensive.

  Evaluation of Fourier transform infrared spectroscopy as a first-line surveillance typing tool for Serratia spp. isolates derived from clinical materials · 2026 · DOI

Most-cited papers in Escherichia coli research studies

• Virulence, phenotype and genotype characteristics of endodontic <i>Enterococcus</i> spp. · Oral Microbiology and Immunology · 2004 · 111 citations
• Silent Genes: Antimicrobial Resistance and Antibiotic Production · Polish Journal of Microbiology · 2021 · 59 citations
• Extra-intestinal pathogenic Escherichia coli – threat connected with food-borne infections · Annals of Agricultural and Environmental Medicine · 2019 · 42 citations
• Genetic diversity and antibiotic resistance of <i>Shigella</i> spp. isolates from food products · Food Science & Nutrition · 2021 · 37 citations
• Every Student a Leader. · Principal leadership · 2006 · 33 citations
• An inducible transposon mutagenesis approach for the intracellular human pathogen Chlamydia trachomatis · Wellcome Open Research · 2021 · 23 citations
• Prevalence of<i>E. coli</i>O157:H7 strains in irrigation water and agricultural soil in two district municipalities in South Africa · International Journal of Environmental Studies · 2020 · 18 citations
• Fecal carriage of extended-spectrum beta-lactamase and ampc beta-lactamase-producing enterobacteriaceae in a turkish community · Nigerian Journal of Clinical Practice · 2018 · 16 citations
• Analysis of Escherichia Coli O104:H4 Outbreak in Germany in 2011 Using Differentiation Method for Unusual Epidemiological Events · Central European Journal of Public Health · 2016 · 11 citations
• Antimicrobial Resistance, Virulence Factor-Encoding Genes, and Biofilm-Forming Ability of Community-Associated Uropathogenic <i>Escherichia coli</i> in Western Saudi Arabia · Polish Journal of Microbiology · 2022 · 11 citations

Most recent work

• Complete genomes of 21 avian pathogenic <i>Escherichia coli</i> isolated from colibacillosis cases in Georgia poultry · Microbiology Resource Announcements · 2026
• Temporal GWAS identifies a widely distributed novel protein Stv contributing to pathogen success in Shigella spp. · bioRxiv · 2026
• Detection of virulence genes and multidrug resistance in Escherichia coli isolated from buffaloes · IJID One Health · 2026
• Comparative Genomic Diversity of Escherichia coli Strains Isolated from Western Kenya · 2026
• Enterohemorrhagic Escherichia coli senses colonic oxygen availability to modulate its virulence and colonization · iScience · 2026
• CDC Reports Rise in Drug-Resistant <i>Shigella</i> Infections · JAMA · 2026
• Resident and Engrafting E. coli Populations Expand Through Dissimilar Pathways in the Inflamed Gut · bioRxiv · 2026
• Distribution of prophage-encoded Pas sRNAs across pathogenic Escherichia coli · bioRxiv · 2026
• Evaluating Genomic Surveillance Methods for Shigella sonnei in a High-Income Setting · medRxiv · 2026
• Genomic diversity, antibiotic resistance, and maturation‑dependent adhesion of F18 enterotoxigenic Escherichia coli strains in porcine intestinal cells · Gut Pathogens · 2026

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