ESKAPE Pathogens
One-Sentence Definition
ESKAPE is an acronym for six bacterial species that most often “escape” the activity of standard antibiotics and dominate serious hospital-acquired infections.
Simple Explanation
Six organisms that account for a large share of untreatable hospital infections — worth knowing as a group.
Detailed Scientific Explanation
| Letter | Organism | Signature resistance |
|---|---|---|
| E | Enterococcus faecium | Vancomycin resistance (VRE, vanA/vanB) |
| S | Staphylococcus aureus | Methicillin resistance (MRSA, mecA → PBP2a) |
| K | Klebsiella pneumoniae | ESBL, carbapenemases (KPC, NDM, OXA-48) |
| A | Acinetobacter baumannii | Carbapenem resistance (OXA-23), pan-drug resistance |
| P | Pseudomonas aeruginosa | Efflux + porin loss + AmpC; intrinsic multidrug resistance |
| E | Enterobacter species | Inducible AmpC, carbapenemases |
Some versions extend the list to ESKAPEE by adding Escherichia coli.
Shared features: hospital and device association (Device-Associated Infections), Biofilm formation, ready acquisition of Plasmid-borne resistance, and environmental persistence.
The WHO bacterial priority pathogens list covers similar ground with a formal prioritization framework and drives research funding.
Clinical Importance
- Concentrated in ICUs, transplant, oncology, and burn units
- Frequently the reason a patient needs last-line agents (colistin, ceftazidime-avibactam, cefiderocol)
Research Importance
- The target set for AI for Antibiotic Discovery and new-agent development
Diagnostic Relevance
- Rapid identification and resistance detection changes therapy within hours
AMR Relevance
This group defines the practical urgency of Antimicrobial Resistance.
Public Health
- Surveillance priority; Infection Prevention and Control targets; One Health reservoirs for some species
Related MOCs
Active Recall Questions
- Expand ESKAPE and give the signature resistance for each.
- Which non-resistance features do these organisms share?
- What does the WHO priority pathogens list add beyond the acronym?