Antimicrobial Resistance in Hospital Environments

Antimicrobial resistance within hospital environments represents a critical challenge to patient safety and public health. Surfaces, medical equipment and water outlets provide refuges for bacteria that acquire and maintain resistance to key antibiotic classes. Within wards and intensive care units, resistant strains such as methicillin-resistant Staphylococcus aureus, carbapenemase-producing Enterobacterales and multidrug-resistant non-fermenters persist in hidden reservoirs, from sink drains to touchscreens. The convergence of high antibiotic usage, inadequate decontamination and vulnerable patient populations drives selection and dissemination of resistant clones. Genomic surveillance has revealed clonal persistence across time and space, showing how hospital reservoirs fuel outbreaks. Practical interventions—enhanced cleaning protocols, engineering controls to limit biofilm formation, and real-time monitoring of resistance genes—offer pathways to mitigate risk. A unified approach encompassing environmental hygiene, antimicrobial stewardship and molecular epidemiology is essential to curb healthcare-associated infections and protect global health.

Research from Nature Portfolio

Recent studies have mapped the distribution and persistence of extended-spectrum β-lactamase and carbapenemase genes on hospital surfaces in neonatal wards across low- and middle-income settings. Using targeted PCR screening coupled with whole-genome sequencing, investigators identified dominant clones of Klebsiella pneumoniae, Acinetobacter baumannii and other Gram-negative bacteria colonising patient care areas, often mirroring bloodstream isolates in neonatal sepsis. Findings underscore persistent sinks and drains as hotspots for carbapenemase producers and highlight gaps in infection prevention guidelines. In a separate retrospective surveillance spanning six years in an orthopaedic unit, researchers characterised multidrug-resistant organisms isolated from patient specimens. Analysis revealed high prevalence of methicillin-resistant Staphylococcus aureus and extended-spectrum β-lactamase-positive Enterobacterales, with age, open injury and central nervous system trauma identified as independent risk factors for resistant infections. These insights inform targeted control measures in surgical settings.

Antimicrobial Resistance in Hospital Environments publication trend

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

Technical terms

Extended-spectrum β-lactamases (ESBLs): Enzymes that confer resistance to penicillins and cephalosporins, undermining key antibiotic classes.

Carbapenemases: β-Lactamases capable of hydrolysing carbapenems, often regarded as last-resort antibiotics.

Multidrug-resistant organism (MDRO): Bacteria resistant to three or more antimicrobial categories, posing a treatment challenge.

Metagenomic sequencing: High-throughput technique to analyse collective genetic material of microbial communities without culture.

Healthcare-associated infection (HCAI): Infections acquired by patients during hospital care, often linked to resistant pathogens.

References

1. Colonisation of hospital surfaces from low- and middle-income countries by extended spectrum β-lactamase- and carbapenemase-producing bacteria. Nature Communications (2024).
2. Insights into the Microbiome and Antibiotic Resistance Genes from Hospital Environmental Surfaces: A Prime Source of Antimicrobial Resistance. Antibiotics (2024).
3. Retrospective analysis of drug resistance characteristics and infection related risk factors of multidrug-resistant organisms (MDROs) isolated from the orthopedics department of a tertiary hospital. Scientific Reports (2023).