An 8-year-old male presents with a red and sore throat. The rapid group A Streptococcus screen is negative, and a sheep blood agar is inoculated
At 24 hours, there are no beta-hemolytic colonies present and moderate growth of normal upper respiratory flora. At 48 hours, the same culture results are present. Which of the following statements does not explain these results?
A) The patient received treatment prior to specimen collection.
B) His sore throat is due to Haemophilus influenzae, and it will not grow on blood agar.
C) The causative agent is not bacterial.
D) The culture was taken very early in the infection.
B
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What will be an ideal response?
A pulmonary angiogram is usually ordered:
a. as the first test to identify a pulmonary embolism. b. when other tests for a pulmonary embolism are inconclusive. c. in conjunction with a magnetic resonance image to identify a pulmonary embolism. d. in conjunction with an extremity venogram to identify a pulmonary embolism.