USMLE Test 3 Exam Questions
with Correct Verified Answers
Latest Update (2024/2025)
Guaranteed Pass
Which of the following is true regarding Rickettsia rickettsii:
A. Highest attack rates occur in Colorado and Utah
B. It can be transmitted by flying squirrels
C. Sheep and cattle are important reservoirs
D. It is transmitted by ticks - ANS ✓D
Which of the following statements is true concerning Q fever:
A. The organism is transmitted by fleas
B. Headache, fever, and petechial rash are characteristic features of
the disease
C. The chronic disease is call Brill-Zinsser
D. The disease is caused by Coxiella burnetii - ANS ✓D
Each of the following statements concerning epidemic typhus is
correct EXCEPT:
A. The disease is characterized by a rash that begins on the trunk and
moves distally.
B. The recrudescent form of the disease is called Brill-Zinsser
C. The disease is caused by Rickettsia typhi
USMLE Test 3
, 2
USMLE
D. The causative organism is transmitted to humans by lice - ANS ✓C
Each of the following statements concerning Q fever is correct
EXCEPT:
A. Rash is a prominent feature
B. It is transmitted by respiratory aerosol
C. Sheep and cattle are in important reservoir
D. It is caused by Coxiella burnetii - ANS ✓A
The infection most often associated with Cryptococcus neoformans is:
A. Septic arthritis
B. Sinusitis
C. Pneumonia
D. Meningitis - ANS ✓D
Which of the following statements regarding mycoplasmas is NOT
correct?
A. Mycoplasmas are the smallest free-living micro-organisms.
B. Mycoplasmas are resistant to cell wall active antibiotics.
C. Mycoplasmas are common commensals of the respiratory and
urogenital tracts.
D. Mycoplasmas stain well with the Gram's stain.
E. Mycoplasmas grow slowly on enriched media. - ANS ✓D
Which of the following statements concerning Chlamydia trachomatis
infections is NOT correct?
A. Serology is the diagnostic test of choice in the diagnosis of acute
infection.
USMLE Test 3
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