bacteria
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise bacterial entities, assess their identity and biological state, and determine appropriate observation, handling or use within the evidence and authorization available.
Bacteria are cellular prokaryotic organisms belonging to the domain Bacteria, distinct from Archaea and Eukarya, that lack a membrane-bound nucleus, usually reproduce by binary fission, and exhibit extensive morphological, metabolic and ecological diversity.
It can be Reconcile a bacterial identification with a named taxonomy while retaining synonyms and unresolved assignments.; Compare cell, culture and molecular observations without conflating their measurement targets.; Assess whether evidence supports active growth, survival, dormancy or only detection of bacterial material.; Connect observed bacterial traits to a particular strain, environment and measurement method.; Determine whether proposed observation, storage, transfer or use is supported by the applicable assessment and authorization.; Flag when evidence supports only a broader bacterial group or mixed population rather than a single identified organism..
Distinguishing features
Establish affiliation with Bacteria using documented identification evidence; small size and absence of a membrane-bound nucleus alone do not distinguish bacteria from archaea.
Distinguish bacterial cells from viruses through evidence of cellular organization and bacterial identity; dependence on a host alone does not resolve the boundary.
Treat spherical, rod-shaped and spiral forms as descriptive observations, not sufficient identification tests.
Do not require absence of chlorophyll: photosynthetic bacterial groups fall within scope.
Separate a taxon name from a particular strain, isolate or observed cell; evidence about one does not automatically establish the properties of the others.
Scope
+ Bacterial identity, taxonomic placement and identification uncertainty
+ Distinctions among taxa, strains, isolates, cells, populations and communities
+ Cell structure, morphology, physiological activity and reproductive state
+ Genetic variation, metabolic capabilities and environmental relationships
+ Evidence governing bacterial handling, monitoring and intended use
- Archaea, viruses and microbial eukaryotes as independently modelled entities
- Host diseases, clinical diagnoses and treatment decisions
- Mixed microbiomes as whole ecological communities
- Culture vessels, laboratory instruments and experimental protocols
- Purified bacterial products, toxins and manufactured preparations
Characteristics
- Entity level
- taxon | strain | isolate | cell | population | bacterial community component Determines which observations and claims can legitimately describe the entity.
- Taxonomic placement
- Taxon, rank, nomenclatural authority, reference taxonomy identifier and version or access date Makes identification traceable without treating Bacteria as a species with one binomial.
- Identification confidence
- unresolved | provisional | supported at a stated rank, with method and limitations Prevents action based on greater taxonomic precision than the evidence supports.
- Cell morphology and dimensions
- Shape and arrangement; length, width or diameter in µm; observation conditions Supports recognition and comparison while retaining growth-dependent variation.
- Cell envelope phenotype
- Observed staining response and envelope evidence; atypical, variable or unknown permitted Supports identification and interpretation without equating a stain result with complete envelope structure.
- Physiological state
- Evidence for activity, growth, dormancy, sporulation, injury or death; unknown permitted Separates detected material from evidence about living and active cells.
- Population abundance
- cells/mL, cells/g, CFU/mL, CFU/g or assay-specific quantity, with method and uncertainty Prevents cell counts, colony counts and molecular signals from being treated as interchangeable.
- Metabolic and growth profile
- Observed substrate use, energy sources and oxygen relationships under stated temperature, pH and medium conditions Connects physiological claims to the conditions under which they were demonstrated.
- Genetic identity and functional evidence
- Sequence accession, strain or isolate linkage, detected features and associated phenotype evidence Separates genetic potential from demonstrated function.
- Ecological occurrence
- Habitat, host or substrate; location, sampling date and evidence of association Distinguishes detection at a site from persistent residence or an established ecological role.
- Handling and use status
- Intended activity, applicable assessment, authorization, restrictions and unresolved evidence Makes permissible action specific to the organism, material and context.
Analytical facets
- substance
- living
- origin
- natural
- agency
- inert
- mobility
- not-applicable
- scale
- not-applicable
- affordances
- observable
Also called
+76
Where this came from
oewn:2024 · CC BY 4.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Bacterial identity and resolution Establish bacterial affiliation and the biological entity to which each claim applies.
The registry term spans an entire domain, while most actionable observations concern narrower taxa, strains or samples.
Domain and taxonomic placement
Record the evidence and authority used to place an entity within Bacteria.
Supported bacterial assignment
An identification should specify its supported rank, reference taxonomy and remaining ambiguity.
- What evidence supports assignment to Bacteria and distinguishes the entity from archaea or microbial eukaryotes? definition
- Which taxonomy, identifier, authority and version or access date support the reported name and rank? provenance
Taxon, strain and sample boundaries
Separate named biological groups from particular lineages, collected material and observed cells.
Claim-bearing entity
Properties should remain attached to the taxon, strain, isolate, cell or population actually examined.
- Does this record describe a taxon, strain, isolate, individual cell, population or bacterial fraction of a mixed sample? boundary
- What collection accession, isolation history or sample lineage connects the observations to that entity? provenance
Cell organization and state Describe bacterial cellular features and the evidence for present biological activity.
Bacterial appearance, envelope traits and survival states affect recognition and interpretation but vary among lineages and conditions.
Morphology and envelope
Capture observed cell dimensions, arrangements and envelope-related traits.
Observed cell phenotype
Morphology and staining are conditional observations rather than complete taxonomic diagnoses.
- What cell shapes, dimensions, arrangements and envelope-related observations were recorded, using which methods and growth conditions? measurement
- Which observations distinguish these cells from debris or other microbes, and which remain insufficient for identification? boundary
Growth, survival and dormancy
Separate replication, activity, viability and lineage-specific resting states.
Evidence of living state
Record what each assay demonstrates about living cells without interpreting every positive signal as growth or every failed culture as death.
- What evidence distinguishes active division, metabolic activity, dormancy, injury and death in the observed population? measurement
- If endospores or other differentiated states are reported, what supports that assignment for this lineage and sample? provenance
Metabolism and genetic variation Connect bacterial capabilities to measured physiology and appropriately attributed genetic evidence.
Related bacteria can differ in functional traits, and sequence evidence alone does not establish expression or performance.
Energy and growth conditions
Describe resource use and environmental conditions associated with observed growth or activity.
Conditional metabolic profile
Metabolic claims should state the tested resources, environmental conditions and response.
- Which carbon sources, energy sources and oxygen relationships are demonstrated rather than inferred for this entity? measurement
- Under what temperature, pH, salinity and medium conditions were growth or metabolic activity observed? measurement
Genome and trait attribution
Relate sequence features and mobile genetic elements to their supported bacterial carriers and phenotypes.
Genetic potential versus function
Keep detected genes, predicted functions and experimentally demonstrated traits distinct.
- Which sequence records and attribution evidence connect a detected feature to this strain or population rather than another member of a mixed sample? provenance
- Is the reported capability supported by gene detection, expression evidence or a measured phenotype, and where do these disagree? boundary
Population and ecological context Locate bacterial observations in measurable populations, habitats and biological associations.
A bacterial detection does not by itself establish abundance, persistence, ecological function or host harm.
Abundance and organization
Describe population quantity and organization as dispersed cells, aggregates or surface-associated communities.
Interpretable population observation
Abundance and organization require methods that identify what was counted and how bacterial cells were arranged.
- Does the reported quantity measure cells, colony-forming units, sequence abundance or another signal, and what are its units and detection limits? measurement
- What evidence distinguishes dispersed cells, aggregates and a biofilm, and can the observation be attributed to the bacterial entity in this record? boundary
Habitat and host association
Record where bacteria occur and what is established about their relationships with hosts and surroundings.
Occurrence versus established role
Separate sampling occurrence from persistence, ecological contribution, colonization and disease causation.
- Where, when and from which host, substrate or environmental compartment was this bacterial entity detected? provenance
- What evidence supports persistent residence, a beneficial interaction or a harmful role beyond simple co-occurrence? boundary
Bacterial handling and use Connect proposed actions to bacterial identity, material state and context-specific evidence.
Handling and use decisions cannot be inferred from the word bacteria or from a taxon name alone.
Hazard and susceptibility evidence
Track relevant hazard assessments and measured susceptibility without converting them into clinical decisions.
Context-specific biological assessment
Attribute hazard and susceptibility claims to the assessed strain, material, method and exposure context.
- Which assessment addresses this bacterial entity, material state and proposed activity, and what is its source and date? provenance
- If antimicrobial susceptibility or resistance is reported, which method, conditions and interpretive standard support it? measurement
Permitted actions and material fate
Determine whether observation, storage, transfer, application or disposal is supported for the bacterial material.
Action readiness
An action decision should reflect unresolved identification, viability, purity and authorization where these affect the proposed use.
- Which proposed actions are supported by the current identification, material assessment and applicable authorization? action
- What additional evidence about identity, viability, contamination or material fate is needed before the proposed action can proceed? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The supplied sense is historically dated: bacteria are cellular, are not classified as plants, and some contain chlorophyll or bacteriochlorophyll.
- Morphological kinds are descriptive groupings, not mutually exclusive evolutionary taxa; bacterial species boundaries and classifications require framework-specific interpretation.
- This is recall without source consultation. Verify current standards editions and taxonomic details before operational use; no single binomial, native range or conservation assessment applies to Bacteria as a whole.
- Which of these check these first hold for the sense of bacteria this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Cocci: approximately spherical cells
- Bacilli: rod-shaped cells
- Vibrios: curved rod-shaped cells
- Spirilla: relatively rigid spiral-shaped cells
- Spirochetes: flexible, helically shaped cells with periplasmic flagella
- Filamentous bacteria: cells forming elongated filaments, sometimes branching
- Which of these kinds and varieties hold for the sense of bacteria this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- NCBI Taxonomy - taxid:2 - Identifies Bacteria as a broad taxonomic group, not a species, strain or individual cell.
- Prokaryotic scientific nomenclature - Genus species, with author and publication year where appropriate - Binomials name bacterial species; Bacteria itself is a domain-level name.
- Culture collection accession - Collection acronym followed by an accession identifier - Collections such as ATCC and DSMZ identify deposited strains; equivalent deposits can have different collection identifiers.
- Which of these identifiers and schemes hold for the sense of bacteria this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- International Code of Nomenclature of Prokaryotes, maintained through the International Committee on Systematics of Prokaryotes, governs prokaryotic nomenclature.
- WHO Laboratory Biosafety Manual provides guidance for risk-based handling of biological agents.
- ISO 7218, issued by the International Organization for Standardization, sets general requirements and guidance for microbiological examinations in the food chain.
- CLSI M100, issued by the Clinical and Laboratory Standards Institute, provides performance standards for antimicrobial susceptibility testing.
- Which of these standards and regulation hold for the sense of bacteria this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Food fermentation, including yogurt production and vegetable fermentation.
- Production of enzymes, recombinant proteins and other industrial biochemicals.
- Wastewater treatment and biodegradation of pollutants.
- Agricultural nutrient cycling, including nitrogen fixation by particular bacterial groups.
- Research on genetics, metabolism, evolution and host-microbe interactions.
- Which of these real-world use hold for the sense of bacteria this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Cell length or diameter - Approximately 0.2-10 for many familiar bacteria; substantial exceptions exist - µm
- Population doubling time - Tens of minutes to days under growth-supporting conditions, depending on organism and environment - time
- Culturable concentration - Sample- and method-dependent; a colony may originate from one cell or a cell aggregate - CFU/mL or CFU/g
- Which of these typical measurements hold for the sense of bacteria this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Some bacteria cause infections or produce toxins; pathogenicity cannot be inferred from membership in Bacteria alone.
- Antimicrobial resistance can compromise treatment and spread through bacterial populations.
- Contamination can spoil food or compromise water, medicines and industrial processes.
- Biofilms can promote persistence on equipment, infrastructure and medical devices.
- Culture-based detection can miss organisms that do not grow under the selected conditions.
- Which of these failure modes and hazards hold for the sense of bacteria this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Community composition varies with climate, salinity, soil chemistry, host distribution and other environmental conditions.
- Pathogen prevalence and antimicrobial resistance patterns differ geographically and over time.
- Biosafety, environmental release and food or water microbiological requirements vary by jurisdiction.
- Which of these regional variation hold for the sense of bacteria this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Archaea - Also prokaryotic, but distinguished by evolutionary relationships and characteristic differences in membrane chemistry and molecular machinery.
- Viruses - Viruses are acellular infectious entities that depend on host cells for replication; bacteria are cells with their own ribosomes.
- Eukaryotic microorganisms - Their cells possess a membrane-bound nucleus; bacterial cells do not.
- Cyanobacteria - A subgroup within Bacteria characterized by oxygenic photosynthesis, rather than a separate peer category.
- Bacterial species - A species is a narrower taxonomic grouping within Bacteria; the domain encompasses many such groups.
- Bacterial strain - A strain denotes a particular isolate or lineage; it is neither the whole domain nor an individual cell.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of bacteria this model covers, and on what evidence? provenance
What the second pass must settle
- Which taxonomy and nomenclatural authorities should govern this registry entry, and how should conflicting or revised bacterial names be represented?
- Does an existing Vercy world model already own bacteria or any of these responsibilities, requiring a link or reuse instead of a duplicate publication?
- What evidence thresholds should distinguish supported strain identification, provisional taxon assignment and unresolved mixed-sample detection?
- Which lineage-specific developmental states and ecological traits require extensions beyond this domain-level model?
- For which narrower bacterial taxa are native range or conservation assessment meaningful and available, rather than inappropriate inherited fields?