Antimicrobial Resistance in Enterobacteriaceae Infections

The Enterobacteriaceae family, which includes key pathogens such as Escherichia coli and Klebsiella pneumoniae, has emerged as a major contributor to the global antimicrobial resistance (AMR) crisis. Resistance mechanisms in these organisms range from extended-spectrum β-lactamases (ESBLs) and AmpC enzymes to carbapenemases and colistin-modifying mcr genes. Horizontal gene transfer via plasmids, transposons and integrons accelerates dissemination across clinical, agricultural and environmental settings. The clinical impact is profound: treatment failures, prolonged hospital stays and increased mortality, particularly in vulnerable populations such as neonates, immunocompromised patients and those in resource-limited regions. Surveillance efforts reveal geographic hotspots in sub-Saharan Africa, South Asia and parts of Europe, where empirical therapy often outpaces laboratory confirmation. Strategies to curb resistance include rapid diagnostics, antimicrobial stewardship, infection prevention and control measures, and improvements in water, sanitation and hygiene infrastructure. On the frontier of research are novel β-lactamase inhibitors, phage therapy and microbiome-based interventions. A coordinated One Health approach is essential to contain the spread of resistant Enterobacteriaceae and safeguard the efficacy of existing antibiotics.

Research from Nature Portfolio

One-day direct susceptibility testing protocols have been evaluated in clinical laboratories to accelerate detection of ESBL-producing E. coli and K. pneumoniae. A comparison of three chromogenic and antibiotic-based assays demonstrated sensitivities of over 97% for each method, though specificity varied notably. Integration of an SMS-based result-relay system shortened reporting time from four days to under 24 hours, enabling prompt therapeutic adjustment. The study emphasises the potential of streamlined laboratory workflows and digital communication to enhance AMR surveillance and optimise patient management in settings with limited resources.

Antimicrobial Resistance in Enterobacteriaceae Infections publication trend

The graph below shows the total number of articles in antimicrobial resistance in enterobacteriaceae infections across all publications each year (not limited to Nature Index journals).

Technical terms

Extended-spectrum β-lactamases (ESBLs): Enzymes that hydrolyse penicillins and cephalosporins, conferring resistance to broad-spectrum β-lactam antibiotics.

Carbapenemases: β-Lactamases capable of inactivating carbapenem antibiotics, often carried on mobile genetic elements.

Horizontal gene transfer: Movement of genetic material between bacteria by plasmids, transposons or phages, facilitating rapid spread of resistance.

One Health: Integrative framework recognising the interconnectedness of human, animal and environmental health in managing AMR.

References

1. Risk Factors, Temporal Dependence, and Seasonality of Human Extended-Spectrum β-Lactamases-Producing Escherichia coli and Klebsiella pneumoniae Colonization in Malawi: A Longitudinal Model-Based Approach. Clinical Infectious Diseases (2023).
2. Multidrug-Resistant Bacteria in Immunocompromised Patients. Pharmaceuticals (2024).
3. Multicenter Surveillance of Antimicrobial Resistance among Gram-Negative Bacteria Isolated from Bloodstream Infections in Ghana. Antibiotics (2023).
4. Evaluation of three protocols for direct susceptibility testing for gram negative-Enterobacteriaceae from patient samples in Uganda with SMS reporting. Scientific Reports (2024).