Serratia

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Definition

Noun 1. A genus of bacteria: Serratia is the scientific name for a genus of motile, rod-shaped bacteria. These bacteria are Gram-negative, meaning they do not retain the crystal violet stain used in a common laboratory test. They are also described as peritrichous, meaning they have flagella (whip-like structures for movement) distributed all over their cell surface.

Usage Notes
  • The word is always capitalized because it is a proper noun referring to a specific genus in biological taxonomy.
  • It is primarily used in scientific, medical, and microbiological contexts.
  • When referring to a single species within this genus, the genus name is italicized and followed by the species name (e.g., ).
Examples
  • Scientific Context:
    • The laboratory identified the pathogen as Serratia from the water sample.
    • Some species of Serratia are known to produce a distinctive red pigment.
  • Medical Context:
    • Hospital-acquired infections can sometimes be caused by Serratia.
    • The doctor prescribed a specific antibiotic effective against Serratia bacteria.
Advanced Usage
  • "Serratia marcescens": This is the most well-known species within the genus. It is often used in laboratory demonstrations and can be an opportunistic pathogen in healthcare settings.
    • The classic experiment involved culturing Serratia marcescens to study bacterial growth.
Variants and Related Words
  • Serratiaceae (n): The name of the bacterial family to which the genus belongs.
  • Serratia infection (n): A medical condition caused by bacteria of this genus.
Synonyms
  • Genus Serratia: The full taxonomic designation.
  • There are no common-language synonyms, as this is a precise scientific term. In general contexts, it might be referred to as "a type of bacteria" or "Gram-negative rods."
Related Phrases and Terms
  • Gram-negative bacterium: A broad category of bacteria that includes . This classification is important for determining antibiotic treatment.
  • Opportunistic pathogen: A microorganism that typically does not cause disease in healthy individuals but can cause infection in people with weakened immune systems, a description that applies to some species.
  • Nosocomial infection: An infection acquired in a hospital or healthcare setting, which is a common context for infections.
Noun
  1. a genus of motile peritrichous bacteria that contain small Gram-negative rod

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