Question

A 25-year-old man presents with fever, cough, and shortness of breath. He is experiencing chest pain and had a sore throat 2 weeks ago. He is working as a sales officer. He is married and denies any extramarital affairs. He has not traveled abroad in the recent past and denies using any illicit drugs.

What is the most likely cause of his symptoms?

1. Chlamydophila pneumoniae
2. Legionella pneumophila
3. Streptococcus pyogenes
4. Klebsiella pneumoniae
5. Pneumocystis jiroveci

Answer 1

1. Chlamydophila pneumoniae

The 25-year-old man's symptoms are most likely caused by Chlamydophila pneumoniae, which can follow an upper respiratory tract infection and presents with symptoms similar to his.

Step-by-step explanation:

Based on the symptoms presented by the 25-year-old man, including fever, cough, chest pain, and a recent history of sore throat, the most likely cause of his symptoms is Chlamydophila pneumoniae.

This organism typically causes atypical pneumonia, which frequently follows an upper respiratory tract infection such as a sore throat.

The fact that he has not traveled abroad recently and denies extramarital affairs makes it less likely to be associated with Legionella pneumophila (often linked with travel), Streptococcus pyogenes (often associated with more acute symptoms), Klebsiella pneumoniae (commonly associated with alcoholism and aspiration pneumonia), or Pneumocystis jiroveci (primarily affects immunocompromised individuals).