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Old 10-03-2012
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Arrow Billy Step 1 Questions #7

A 33-year-old male who practices veterinary medicine in Fresno (central California) is seen in the emergency room with chills, high fever, persistent unproductive cough, and generalized malaise. Physical examination reveals no evidence of pharyngitis, sinusitis, or otitis media. The patient does not have a rash and vehemently proclaims that he has not been bitten by any vectors. On his 10-acre farm, he raises sheep, chickens, turkeys, ostriches, and emus. Acomplement fixation assay for Coxiella is negative. Given the PE and history, which of
the following is the most likely etiologic agent?

(A) C. pneumoniae
(B) C. psittaci
(C) C. trachomatis
(D) Ehrlichia canis
(E) Rickettsia typhi
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Old 10-03-2012
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C psittaci
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Old 10-03-2012
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I think its C.psittaci....
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Old 10-03-2012
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?atypical pneumonaia,associated with birds
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Old 10-03-2012
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Default my answer :)

(B) C. psittaci
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chlamydia psittaci-------cause psittacocis with pigeon/parrot excreta......LCL inclusion bodies
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Old 10-03-2012
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I think it's not A, C, E
Don't know anything about B and D. So one of those can be answer. Hehehe


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its c psittacai
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Quote:
Originally Posted by koolkiller88 View Post
I think it's not A, C, E
Don't know anything about B and D. So one of those can be answer. Hehehe


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also add D too......ehrlichia is usually transmitted by ticks.....
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Old 10-05-2012
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Correct Answer C is correct

The term “psittacosis” is applied to the
human disease acquired from contact with
birds. “Ornithosis” is applied to infections associated
with all types of domestic and free-living
birds. In humans, C. psittaci (choice B) produces
a range of clinical manifestations ranging from
severe pneumonia and sepsis to mild, inapparent
infection. A sudden onset of illness
taking the form of influenza or nonbacterial
pneumonia in a person exposed to birds is suggestive
of psittocosis/ornithosis. Such infections
will respond to tetracycline treatment.
C. trachomatis (choice C) is transmitted person
to person and is associated with ocular, genital,
and some respiratory infections. C. pneumoniae
(choice A) is the newest chlamydia species
which usually presents with asymptomatic or
mild illnesses. Ehrlichiae (choice D) are small,
gram-negative bacilli (similar to rickettsiae)
that cause nonspecific disease symptoms, fever,
chills, headache, vomiting, weight loss, with
few reports of respiratory problems. R. typhi
(choice E) causes endemic typhus with symptoms
similar to those of choice D. Rickettsiae
are usually transmitted by insect vectors.
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