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Legionella

Legionella is a bacterial genus associated with risks in water installations that generate aerosols, such as domestic hot water, showers, spas, cooling towers or HVAC systems. Its control requires planning, sampling, laboratory analysis and documented actions.

Legionella

Microbiology and indicators

Definition

Legionella is a bacterial genus associated with risks in water installations that generate aerosols, such as domestic hot water, showers, spas, cooling towers or HVAC systems. Its control requires planning, sampling, laboratory analysis and documented actions.

Why it matters

Useful for selecting the right method, product family, sampling point, report or traceability workflow in water quality programs.

  • Related AquaVerify product: AquaVerify Cloud / Lab Essentials
  • Related sector: Instalaciones, hoteles y ocio

Related resources

Explore technical guides, AquaVerify products, sector applications and authorized support connected with this definition.

Related terms

  • Adenovirus Adenovirus is an enteric virus that can persist under certain environmental conditions and is used in some contexts as a reference for evaluating viral persistence in water.
  • Viable bacteria Viable bacteria are microorganisms capable of remaining alive and, depending on conditions, growing or forming colonies detectable by culture methods.
  • Bacteriophage A bacteriophage is a virus that infects specific bacteria and replicates within them. In water quality, bacteriophages are used as viral models or indicators to study fecal contamination, treatment behaviour and microbiological barrier performance.
  • Biofilm A biofilm is a microbial community attached to a surface and protected by an extracellular matrix. In water networks it can act as a reservoir of microorganisms and contribute to recontamination.
  • Microbial load Microbial load is the level of microorganisms present in a sample or system. It can be expressed in different units depending on the method and organism evaluated.
  • Host strain A host strain is the bacterium used as the host to detect or enumerate bacteriophages in culture methods. Its selection is critical for assay sensitivity and result interpretation.
  • Total coliforms Total coliforms are a broad group of indicator bacteria that may occur in soil, water or fecal environments. They are used to assess system integrity, treatment effectiveness and possible operational issues.
  • F-RNA coliphages F-RNA coliphages are a subgroup of F-specific coliphages with an RNA genome. They can be used in fecal contamination and viral behaviour studies depending on method, matrix and program objective.

FAQ

Definition: Legionella

Legionella is a bacterial genus associated with risks in water installations that generate aerosols, such as domestic hot water, showers, spas, cooling towers or HVAC systems. Its control requires planning, sampling, laboratory analysis and documented actions.

Why it matters: Legionella

Useful for selecting the right method, product family, sampling point, report or traceability workflow in water quality programs.