Definition

1. Noun:
   • A pathogenic bacterium: Yersinia pestis is a Gram-negative, rod-shaped bacterium of the family Enterobacteriaceae.
   • The causative agent of plague: It is the specific bacterium responsible for causing bubonic, septicemic, and pneumonic plague in humans and other mammals.

Usage Examples

• Noun:
  • The Black Death of the 14th century was caused by Yersinia pestis.
  • Scientists study Yersinia pestis to understand its transmission and develop vaccines.
  • A confirmed diagnosis required the isolation of Yersinia pestis from the patient's sample.

Advanced Usage

• Scientific and Medical Context: The term is used almost exclusively in technical, historical, and public health contexts.
  • The genomic analysis of ancient Yersinia pestis has revealed insights into historical pandemics.
• Bioweapon Concern: Refers to the potential malicious use of the bacterium.
  • International treaties aim to prevent the weaponization of pathogens like Yersinia pestis.

Variants and Related Words

• Plague bacillus: A common historical and alternative name for .
• Y. pestis: The standard abbreviated form used in scientific literature.
• Pasteurella pestis: An obsolete taxonomic name for the same bacterium.

Synonyms

• Plague bacterium: A descriptive synonym emphasizing the disease it causes.

Related Phrases and Terms

• Bubonic plague: The most common form of plague, characterized by swollen lymph nodes (buboes), caused by .
• Pneumonic plague: A severe lung infection form of plague caused by .
• Septicemic plague: A bloodstream infection form of plague caused by .

Noun

1. a bacillus bacterium that causes the plague; aerosolized bacteria can be used as a bioweapon