Which of the following microorganisms commonly causes otitis ...

[Engineer]

Which of the following microorganisms commonly causes otitis externa?
 
  A. Streptococcus pneumoniae
  B. Pseudomonas
  C. Moraxella catarrhalis
  D. Haemophilus influenza

Question 2

A 6-year-old child presents with complaints of unilateral ear pain, fever, and sore throat. The clinician should recognize that this is most commonly due to:
 
  A. Otitis externa
  B. Inner ear infection
  C. Sinusitis
  D. Otitis media

[daiying98]

Answer to Question 1

ANS: B
Otitis externa (OE) is inflammation of the ear canal and outer ear. Frequent causes include pseudomonas and fungal organisms. It is frequently associated with swimming as well as trauma. Acute otitis media (AOM) involves infection of the fluid in the middle ear space. The three bacterial organisms most often associated with AOM include streptococcal pneumonia, Haemophilus influenzae, and Moraxella catarrhalis. Frequently, viral organisms coexist with one of the preceding bacterial causes.

Answer to Question 2

ANS: D
Acute otitis media (AOM) involves infection of the fluid in the middle ear space. The three bacterial organisms most often associated with AOM include streptococcal pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. The patient often complains of unilateral ear pain, which may radiate to the neck or jaw. There is commonly a current or recent history of symptoms consistent with an upper respiratory infection.