Definition

1. Proper noun (Bacterium name):
   • A species of bacteria: Chlamydia psittaci is the scientific name for a specific type of intracellular bacterium. It is a member of the Chlamydia genus but is distinct from Chlamydia trachomatis, which is a common cause of human sexually transmitted infections.

Usage Notes

• Scientific/Medical Term: This term is used almost exclusively in scientific, veterinary, and medical contexts. It is not used in everyday conversation.
• Capitalization: As a proper noun and a scientific name, it is always written in italics () or, if italics are not available, with the genus name capitalized and the species name in lowercase.
• Primary Association: While it is a species, its primary association is with birds and a specific disease in humans, not with common human sexually transmitted infections.

Examples of Usage

• Scientific Context:
  • The veterinarian identified Chlamydia psittaci as the cause of the parrot's illness.
  • Laboratory tests confirmed the presence of Chlamydia psittaci DNA in the sample.
  • Research focuses on the transmission dynamics of Chlamydia psittaci between avian hosts.

Advanced Usage

• Disease Causation: The term is used when discussing the etiology (cause) of the disease psittacosis (also known as parrot fever or ornithosis).
  • Psittacosis is a zoonotic disease caused by the bacterium Chlamydia psittaci.

Variants and Related Words

• Psittacosis (n): The disease caused by infection in humans, characterized by fever, headache, and pneumonia.
• Ornithosis (n): A broader term for the disease caused by , which can affect various birds and be transmitted to humans.
• Chlamydia trachomatis (n): A different species within the same genus, responsible for common human sexually transmitted infections (chlamydia) and trachoma.
• Chlamydophila psittaci (n): An older taxonomic classification for the same bacterium; is the currently accepted name.

Synonyms

• There are no direct common-language synonyms for this specific scientific name. In general medical discussion, it may be referred to as "the psittacosis agent" or "the causative agent of psittacosis."

Related Phrases / Contexts

• Zoonotic pathogen: A pathogen that can be transmitted from animals to humans. is a classic example.
• Avian chlamydiosis: The infection caused by in birds.
• Intracellular bacterium: A bacterium that must live and replicate inside the cells of its host. is an obligate intracellular bacterium.

Noun

1. bacteria responsible for the sexually transmitted disease chlamydia