identifier: traitmech:000082 label: persister cell formation definition: Formation of dormant phenotypic variants (persister cells) that are transiently tolerant to antibiotics and other lethal stresses without carrying genetic resistance, arising stochastically in a population. definition_source: DOI:10.1146/annurev.micro.112408.134306 trait_category: PHYSIOLOGY term_kind: CLASS mapping_status: REVIEWED parent_traits: - traitmech:000080 synonyms: - synonym_text: persistence synonym_type: RELATED_SYNONYM source: DOI:10.1146/annurev.micro.112408.134306 evidence: - reference: DOI:10.1146/annurev.micro.112408.134306 notes: Lewis reviews persister cells as dormant variants highly tolerant to antibiotics. - reference: DOI:10.1038/nrmicro1557 notes: Lewis links persister-cell dormancy to the recalcitrance of chronic infections. canonical_examples: - taxon_id: NCBITaxon:562 taxon_label: Escherichia coli note: "Paradigm for antibiotic-tolerant persister-cell formation (dormant subpopulation; hipA/toxin-antitoxin studies)." reference: PMID:6348026 causal_graphs: - graph_id: persister_dormancy_tolerance title: Persister dormancy and antibiotic tolerance description: Evidence-backed causal sketch linking dormancy to stochastic persister formation and transient antibiotic tolerance. nodes: - node_id: persister_trait label: persister cell formation node_type: TRAIT grounding: traitmech:000082 description: Stochastic formation of dormant, drug-tolerant variants. - node_id: dormancy_process label: dormancy process node_type: BIOLOGICAL_PROCESS grounding: GO:0022611 description: Reversible quiescence underlying persistence. - node_id: antibiotic_tolerance label: antibiotic tolerance node_type: BIOLOGICAL_PROCESS description: Transient survival of lethal antibiotic exposure. - node_id: biphasic_killing_curve label: biphasic killing curve node_type: EXPERIMENTAL_FACTOR description: 'Hallmark biphasic time-kill readout: rapid death of bulk population then slow killing of persister subpopulation.' - node_id: mic_susceptible label: minimum inhibitory concentration of susceptible cells node_type: QUALITY description: MIC value characteristic of antibiotic-susceptible cells; unchanged in persisters. - node_id: antibiotic_resistance label: antibiotic resistance node_type: BIOLOGICAL_PROCESS description: Genetically encoded ability to grow at elevated antibiotic concentrations; distinct from tolerance/persistence. - node_id: elevated_mic label: elevated minimum inhibitory concentration node_type: QUALITY description: Increased MIC characteristic of resistant bacteria, distinguishing resistance from persistence. - node_id: whole_population_phenotype label: whole-population phenotype node_type: QUALITY description: Property applying to the entire population rather than a small subpopulation. - node_id: oxidative_phosphorylation label: oxidative phosphorylation node_type: BIOLOGICAL_PROCESS description: Residual respiratory ATP synthesis maintaining proton motive force in persisters. grounding: GO:0006119 - node_id: proton_motive_force label: proton motive force node_type: BIOLOGICAL_PROCESS description: Transmembrane electrochemical gradient maintained by persisters during starvation. edges: - subject: dormancy_process predicate: enables object: persister_trait description: Dormancy underlies stochastic persister formation. evidence: - reference: DOI:10.1146/annurev.micro.112408.134306 notes: Lewis reviews persisters as dormant tolerant variants. predicate_id: RO:0002327 - subject: persister_trait predicate: enables object: antibiotic_tolerance description: Persister cells transiently tolerate antibiotics. evidence: - reference: DOI:10.1038/nrmicro1557 notes: Lewis links persisters to recalcitrant infection. predicate_id: RO:0002327 - subject: persister_trait predicate: characterized by object: biphasic_killing_curve description: Persistence produces a biphasic time-kill curve diagnostic of a tolerant subpopulation. evidence: - reference: DOI:10.1128/ecosalplus.esp-0025-2022 notes: A hallmark of persistence is the biphasic killing curve. - subject: persister_trait predicate: has characteristic object: mic_susceptible description: Persisters retain the same MIC as susceptible cells, distinguishing persistence from resistance. evidence: - reference: DOI:10.1186/s12866-024-03628-3 notes: Persisters had the same minimum inhibitory concentration (MIC) as the susceptible cells. - subject: antibiotic_resistance predicate: has characteristic object: elevated_mic description: Resistant bacteria have a significantly higher MIC, contrasting with the unchanged MIC of persisters. evidence: - reference: DOI:10.1186/s12866-024-03628-3 notes: The MIC of resistant bacteria was significantly higher; scope edge excluding resistance from persistence. - subject: antibiotic_tolerance predicate: has characteristic object: whole_population_phenotype description: Tolerance applies to the whole population, whereas persisters are a small subpopulation. evidence: - reference: DOI:10.1186/s12866-024-03628-3 notes: Persisters are a smaller subpopulation, whereas tolerance is for the microbiota as a whole. - subject: persister_trait predicate: enables object: oxidative_phosphorylation description: Persisters actively undergo a residual level of oxidative phosphorylation even during nutrient starvation. evidence: - reference: DOI:10.1111/1751-7915.70042 notes: Persisters still actively generated PMF by undergoing a certain level of oxidative phosphorylation, even after complete nutrient starvation for 24 h. predicate_id: RO:0002327 - subject: oxidative_phosphorylation predicate: results in object: proton_motive_force description: Residual oxidative phosphorylation generates proton motive force that sustains persister survival. evidence: - reference: DOI:10.1111/1751-7915.70042 notes: Persisters generated PMF via oxidative phosphorylation; ETC components maintain PMF underlying tolerance. curation_history: - timestamp: '2026-06-04T00:00:00Z' curator: claude action: PROPOSED_FROM_RESEARCH changes: Proposed candidate PHYSIOLOGY trait (persister cell formation); sub-variant of dormancy. Distinct from genetic antibiotic resistance. llm_assisted: true - timestamp: '2026-06-08T13:00:00Z' curator: claude action: CURATED_CAUSAL_GRAPH changes: Added evidence-backed causal graph (persister dormancy/tolerance) with GO node grounding and RO predicate groundings; promoted PROPOSED to REVIEWED. llm_assisted: true - timestamp: '2026-06-23T00:00:00Z' curator: claude action: ENRICH_CAUSAL_GRAPH changes: Added 6 evidence-backed generic edges (7 new nodes) from the deep-research report. llm_assisted: true - timestamp: '2026-06-24T17:21:15Z' curator: claude action: GROUND_CAUSAL_PREDICATES changes: Grounded 1 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (RO:0002327×1). llm_assisted: true - timestamp: '2026-06-24T17:21:20Z' curator: claude action: GROUND_CAUSAL_NODES changes: Grounded 1 causal-node grounding field(s) via mappings/node_grounding.tsv (GO:0006119×1). llm_assisted: true