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Chlamydia
Exam 2
41
Pathology
Professional
05/07/2011

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Term
Chlamydia is an obligate intracellular organism that cannot make ______.
Definition
ATP
Term
extracellular elementary body in chlamydia
Definition
infectious
resistant to drying
metabolically inactive
Term
intracellular reticulate body in chlamydia
Definition
active
divides
produces new elementary bodies (inclusion bodies)
Term
Like bacteria, chlamydia have both ____ and ____.
Definition
DNA and RNA
Term
How do chlamydia reproduce?
Definition
2 stage life cycle
Term
How are chlamydia similar to bacteria?
Definition
-small like smallest bacteria
-have both DNA and RNA
-sensitive to antibiotics
Term
How are chlamydia similar to viruses?
Definition
-intracellular
-size of largest viruses
-cannot generate ATP
Term
How are chlamydia different from bacteria?
Definition
-intracellular
-cannot generate ATP (bacteria can)
-reproduce with 2 stage life cycle (bacteria use fission)
Term
How are chlamydia different from viruses?
Definition
-have both DNA and RNA (viruses have either/or)
-reproduce with 2 stage life cycle (viruses are synthesized)
-sensitive to antibiotics (viruses are resistant)
Term
What do chlamydia invade?
Definition
epithelium, especially columnar epithelium (respiratory, conjunctivitis, endocervix)
Term
What are example of destruction resulting from the inflammatory reaction caused by a chlamydia infection?
Definition
corneal scarring
fallopian tube obstruction
Term
What type of genital infections is Chlamydia trachomatis responsible for?
Definition
cervicitis
nongonococcal urethritis
epididymitis
Term
Who usually gets inclusion conjunctivitis as a result of a Chlamydia trachomatis infection?
Definition
newborns
Term
What conditions does Chalmydia trachomatis cause in infants?
Definition
inclusion conjunctivitis
infant pneumonia
Term
What can significant fallopian tube scarring lead to?
Definition
infertility
ectopic tubal pregnancy
chronic pelvic pain (PID)
Term
discharge typical of chlamydia infection
Definition
clear
Term
Chlamydial pneumonia occurs _______ after birth.
Definition
4-11 weeks
Term
symptoms of chlamydial pneumonia
Definition
respiratory distress
rhinitis
cough
afebrile
feeding problems
Term
An infant infected with chlamydial pneumonia will have...
Definition
anti-chlamydial IgM antibodies
Term
What is the most sexually transmitted disease in the US?
Definition
Chlamydia trachomatis
Term
Inclusion conjunctivitis presents ______ after birth.
Definition
5-14 days
Term
What is the diagnosis of inclusion conujunctivitis based on?
Definition
demonstrating inclusion bodies in infected cells
Term
What serotypes of Chlamydia trachomatis are responsible for genital infections, inclusion conjunctivitis, and infant pneumonia?
Definition
serotypes D-K
Term
What serotypes of Chlamydia trachomatis are responsible for blindness in Asia, Africa, and Native Americans?
Definition
serotypes A, B, and C
Term
What is a major cause of preventable blindness in Asia, Africa, and Native Americans?
Definition
trachoma
Term
What does trachoma cause?
Definition
inturned eyelashes
corneal scarring
eventual blindness
Term
transmission of Chlamydia trachomatis responsible for trachoma
Definition
hand to hand transfer of infected eye secretions or sharing contaminated clothing/towels
Term
another name for trachoma
Definition
granular conjunctivitis
Term
What special type of testing can be done to detect chlamydia infections (as well as Neisseria gonorrheae)?
Definition
direct immunofixation (DIF) antibody labeling
Term
What bacteria causes lymphogranuloma venereum?
Definition
Chlamydia trachomatis
Term
What countries is lymphogranuloma venereum most prevalent in?
Definition
Africa, Asia, South America
Term
symptoms of lymphogranuloma venereum
Definition
painless papule/ulcer as primary lesion, fever, headache, myalgia

progresses to inflammation and swelling of lymph nodes and dissemination

late development of ulcers, fistula, and genital elephantiasis
Term
What bacteria causes psittacosis?
Definition
Chlamydia psittaci
Term
What chlamydial infection is found in pet birds, zoo birds, and turkey flocks and is transmitted to humans by exposure to an infected bird or dried bird excrements?
Definition
Chlamydia psittaci
Term
clinical manifestations of Chlamydia psittaci infection
Definition
atypical pneumonia

headache, fever, macular rash, non-productive cough, rales, consolidation
Term
How do you diagnose psittacosis?
Definition
serology
Term
How is Chlamydia pneumoniae spread?
Definition
respiratory secretions
Term
clinical manifestations of Chlamydia pneumoniae
Definition
atypical pneumonia

without purulent productive cough, near normal lung exam, lung infiltrates on CXR

bronchitis, sinusitis
Term
Chlamydia pneumoniae is/is not a sexually transmitted infection.
Definition
is not
Term
How is a Chlamydia pneumoniae infection diagnosed?
Definition
serology
Term
What is the most important thing to recognize about chlamydia?
Definition
inclusion bodies
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