Definition

Noun: 1. A taxonomic category in biological classification: "Genus Francisella" is the scientific name for a genus of very small, non-motile, Gram-negative, rod-shaped bacteria. 2. A group of pathogenic bacteria: This genus primarily contains species that are highly infectious and act as pathogens or parasites in a wide range of animals, including humans.

Usage Examples

• Noun:
  • The bacterium Francisella tularensis, which causes tularemia, belongs to the genus Francisella. (The specific disease-causing agent is classified within this broader group.)
  • Identification of the microorganism confirmed it was a member of the genus Francisella. (The organism was categorized under this specific genus.)
  • Research into the genus Francisella has increased due to its potential use as a biological weapon. (Scientific studies focus on this entire group of bacteria.)

Advanced Usage

• Taxonomic Context: In formal scientific writing, the genus name is always italicized (or underlined in handwriting) and capitalized: . When used in a general sense, "the genus " or "genus " is common.
• "Type species": The most well-known and representative species of this genus is .

Variants and Related Words

• Francisella (n): The abbreviated form of the genus name, used adjectivally or to refer to the group (e.g., bacteria, research).
• Francisellaceae (n): The name of the family to which the genus belongs.
• Tularemia (n): The disease primarily caused by , the key species within this genus.

Synonyms

• None (Scientific Nomenclature): In formal biological taxonomy, scientific genus names do not have direct common-language synonyms. In general descriptive contexts, one might use phrases like:
  • The Francisella group of bacteria
  • Bacteria of the genus Francisella

Related Phrases / Terms

• Gram-negative bacterium: A key descriptive term for the cell wall structure of all members of genus .
• Facultative intracellular pathogen: A term describing the lifestyle of these bacteria, which can live and multiply inside the host's cells.
• Zoonotic agent: A term highlighting that pathogens in this genus can be transmitted from animals to humans.

Related Idioms

• N/A: Scientific taxonomic names are not used in idiomatic expressions.

Noun

1. a genus of Gram-negative aerobic bacteria that occur as pathogens and parasite in many animals (including humans)