Chlamydia , Rickettsia, Mycoblasma And Spirochete Flashcards
Chlamydophila (Chlamydia) psittaci infections in humans most commonly result after exposure to infected
A. Amphibians
B. Arthropods
C. Avians
D. Mammalians
C
Whichofthefollowingisnottrueof Coxiella burnetii?
A. It is an obligate intracellular parasite.
B. It is transmitted from animals to
humans by inhalation.
C. A rash appears first on the extremities
and then on the trunk.
D. Is the etiologic agent of Q fever, which
may be acute or chronic.
C
Cornealscrapingsarecollectedand examined microscopically using a direct fluorescent test to detect inclusion bodies for the diagnosis of infection caused by
A. Chlamydia trachomatis
B. Ehrlichia chaffeensis
C. Mycoplasma hominis
D. Rickettsia prowazekii
A
What is the reference method for detection of Chlamydia trachomatis in cases of sexually transmitted disease?
A. Tissue culture
B. NoncultureElAmethods
C. DNA-amplification techniques
D. CultureonmodifiedThayer-Martinagar
C
Colonies said to have the appearance of a “fried egg” are characteristic of
A. Ehrlichia chaffeensis
B. Mycoplasma genitalium
C. Mycoplasma hominis
D. Ureaplasma urealyticum
C
Human infection with the causative agent of Q fever is acquired by
A. Inhalation of infectious material
B. Thebiteofamite(chigger)
C. The bite of a body louse
D. The bite of the arthropod Phlebotomus
A
For nonspecific staining ofRickettsia recommended stain is
A. Gimenez stain
B. Gomori silver stain
C. Gram stain
D. Kinyounstain
A
Transmission of the sylvatic form of typhus infection caused by Rickettsia prowazekii is associated with
A. Bats
B. Rabbits
C. Raccoons
D. Squirrels
D
The mild type of typhus fever that is caused by recrudescence of an initial attack of epidemic typhus is known as
A. Brill-Zinsser disease
B. Qfever
C. SaoPaulotyphus
D. Tsutsugamushi disease
A
The causative agent of endemic or murine typhus is
A. Rickettsia akari
B. Rickettsia conorii
C. Rickettsia prowazekii
D. Rickettsia typhi
D
A screening test for the identification of Mycoplasma pneumoniae isolates is the
A. Acid-faststain
B. Gramstain
C. Lysis of red blood cells
D. Catalasetest
C
Agenitalspecimenisinoculatedinto10B broth. After overnight incubation, an alkaline reaction is noted withoutturbidity. What is the most likely explanation?
A. pH change due to molecules in the clinical specimen
B. Presence of Mycoplasma genitalium C. Presence of Mycoplasma hominis
D. Presence of Ureaplasma urealyticum
D
A helicoidal, flexible organism was demonstrated in a blood smear. This motile organism was approximately 12 um long, approximately 0.1 um wide, and had semicircular hooked ends. The description of this organism corresponds most closely to the morphology of
A. Borrelia
B. Leptonema
C. Leptospira
D. Treponema
C
A helicoidal, flexible organism was demonstrated in a blood smear. This motile organism was approximately 12 um long, approximately 0.1 um wide, and had semicircular hooked ends. The description of this organism corresponds most closely to the morphology of
A. Borrelia
B. Leptonema
C. Leptospira
D. Treponema
C
