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36 Cards in this Set

  • Front
  • Back
What type of organism are the Chlamydiae?
Obligate intracellular
What intracellular constituents make up Chlamydiae?
-Prokaryotic ribosomes
Can Chlamydiae make their own ATP?
Are Chlamydiae susceptible to penicillin?
What does it mean to say Chlamydiae have a dimorphic developmental cycle?
They exist in two forms:
-Elementary bodies
-Reticulate bodies
What are the features of Elementary bodies?
They are the infectious form of Chlamydia but not capable of division.
What are the features of the reticulate bodies?
They are what divide, but are not infectious.
How does Chlamydia multiply?
1. Elem bodies infect a host cell
2. Transform into reticulate bodies
3. Reticulate bodies replicate
4. Host cell lysis releases the EB's to infect other host cells
What disease is caused by Chlamydia psittaci? How is it transmitted?
Ornithosis (psittacosis)
-Transmitted via aspiration of birdpoop
What disease is caused by Chlamydia pneumoniae? How is it transmitted?
Mild pneumonia
-Transmitted via person-to- person aerosols
What disease is caused by Chlamydia trachomatis types A/B/Ba/C? How is it transmitted?
-Transmitted via repeated contact, fomites, insects.
What disease is caused by Chlamydia trachomatis types D-K? How is it transmitted?
Inclusion conjunctivitis, nongonorrheal and postgonorrheal urethritis, proctitis, pharyngitis, cervicitis, and arthritis
-All STDs or birth canal
What disease is caused by Chlamydia trachomatis types L1,L2, and L3? How is it transmitted?
Lymphogranuloma venereum
-Transmitted via sex
What can you NOT treat nongonorrheal urethritis with?
Penicillin - chlamydia is not susceptible to it.
What does Follicular conjunctivitis mean?
Inclusions are seen in the conjunctiva - follicles - bubblies
What is the triad of Reiter syndrome?
-Genital infection
And what agent causes the STDs of Chlamydia?
Chlamydia trachomatis types D-K
Does chlamydia Trachomatis types A-C cause STD related disease?
What will be seen in Chlamydial cervicitis?
Pus around the opening of the cervix
Is visualization of pus on the cervix diagnostic of chlamydia? Why?
No - because it could be a dual infection of chlamydia and GC simultaneously.
Because Chlamydia is the most common STD in the world, what is done when pus is seen on the cervix?
Empirical treatment
What is Trachoma? What agent causes it?
Chronic suppurative eye disease
-Caused by Chlamydia trachomatis types A-B-Ba-C
Why is Trachoma bad?
It is the LEADING infectious cause of blindness WORLDWIDE.
How is trachoma transmitted?
-Direct human contact
Where is trachoma primarily seen?
In dry sandy regions among poor people and nomads.
How is the pannus/scarring due to Trachoma treated?
What are 3 diseases caused by Rickettsiae?
-Epidemic typhus
-Scrub typhus
-Spotted fevers
What cells are the targets of Rickettsiae?
-Endothelial cells
-Vascular smooth muscle cells
What symptoms result from Rickettsiae infections?
How is Rickettsiae infection diagnosed?
Via immunostaining in tissue
Via serologic techniques
What is the causative agent of Rocky mountain spotted fever?
Rickettsiae rickettsii
What is the transmission vector of R. rickettsii?
where is rash seen in RMSF?
On the palms and soles
What else do ticks transmit?
What agent causes Ehrlichiosis?
Ehrlichia sennetsu and canis
What are the symptoms of Ehrlichiosis?
-no eschar or rash