Author Question: An 8-year-old male presents with a red and sore throat. The rapid group A Streptococcus screen is ... (Read 243 times)

nramada · **on:** Jun 25, 2018

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.

Question 2

A catalase-negative coccus in pairs and short chains that is susceptible to ethyl hydrocupreine will also

A) require CO2 for growth.
B) be bile soluble.
C) be alpha hemolytic.
D) all of the above.
E) B and C.