19. A patient presents with nonvesicular lesions that are 2 to 10 mm, symmetrical, and scattered
on the oropharynx and mouth. What is their most likely diagnosis?
Corynebacterium diphtheriae
20. A patient presents to the clinician with a sore throat, fever of 100.7F, and tender anterior
cervical lymphadenopathy. The clinician suspects strep throat and performs a rapid strep test
that is negative. What would the next step be?
The patient should be instructed to rest and increase fluid intake, as the infection is
most likely viral and will resolve without antibiotic treatment.
Because the patient does not have strep throat, the clinician should start
broad-spectrum antibiotics in order to cover the offending pathogen.
A throat culture should be performed to confirm the results of the rapid strep test.
The patient should be treated with antibiotics for strep throat, as the rapid strep test
is not very sensitive.
21. Jean has acute otitis externa with fluid that is black and malodorous. Which of the following is
responsible for the infection?
22. You have a patient who is a positive for strep on rapid antigen testing (rapid strep test). You
order amoxicillin after checking for drug allergies (patient is negative) but he returns 3 days
later, reporting that his temperature has gone up, not down (101.5F in office). You also note
significant lymphadenopathy, most notably in the posterior and anterior cervical chains, some
hepatosplenomegaly, and a diffuse rash. You decide:
That he is having an allergic response and needs to be changed to a macrolide
antibiotic
That his antibiotic dosage is not sufficient and should be changed
That he possibly has mononucleosis concurrent with his strep infection