ISSN 2398-2942      

Chlamydia psittaci

icanis
Contributor(s):

Melissa Kennedy

Synonym(s): C. psittaci


Introduction

Classification

Taxonomy

  • Order: Chlamydiales.
  • Family: Chlamydiaceae.
  • Genus: Chlamydia.

Etymology

  • Gk: chlamys - a cloak.

Active Forms

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Clinical Effects

Epidemiology

Transmission

  • Inhalation or ingestion of infectious material, eg respiratory discharges and feces.
  • Vertical transmission via the egg occurs in some birds.

Pathological effects

  • Presenting condition and severity of disease related to immunological state of the host animal.
  • Often partial immune response → chronic relapsing infection.
  • Pathogenicity related to age, sex and health of host animal; route of infection; infective dose; strain and virulence of organism.
  • In birds: causes pneumonia, pericarditis, diarrhea, encephalitis, conjunctivitis.
  • In mammals: causes enzootic abortion of ewes, abortion of cows, genital infections, mastitis, intestinal infection and diarrhea, pneumonia, arthritis, encephalitis, conjunctivitis, hepatitis.
  • In humans: causes pneumonia, psittacosis/ornithosis, abortion, conjunctivitis.
  • Cats: respiratory disease; mainly persistent conjunctivitis.

Other Host Effects

  • The gastrointestinal tract is the natural habitat in both mammals and birds.
  • Inapparent infections may occur with prolonged fecal shedding.
  • Psittacosis (infection due to C. psittaci in psittacine birds) and ornithosis (infection due to C. psittaci in non-psittacine birds) may result in a carrier state after recovery, and stress may cause recurrence.

Control

Control via chemotherapies

Control via environment

  • Zoonotic risk; pregnant women should avoid contact with lambing sheep.

Vaccination

  • Killed and live attenuated vaccines available for cats.
  • Live attenuated vaccines for sheep.

Diagnosis

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code