You are treating a 10-year-old child with a four-day history of severe sore throat. Pharyngeal evaluation reveals tonsillar exudate “pus pockets”. Which of the following apply: Group of answer choices A. infection with Corynebacterium diphtheriae B. infection with Bordetella pertussis C. infection with CA-MRSA D. infection with Chlamydia trachomatis E. infection with Borrelia burgdorferi F. CRO/CRE E. coli G. none of the above apply
The correct answer and explanation is:
The correct answer is G. none of the above apply.
Explanation:
A 10-year-old child with a four-day history of severe sore throat and pharyngeal findings showing tonsillar exudate with “pus pockets” is most consistent with acute bacterial tonsillitis or pharyngitis, most commonly caused by Group A Streptococcus (GAS, Streptococcus pyogenes). None of the options listed directly correspond to the most likely cause of this presentation.
Let’s analyze each option in the context of the clinical picture:
- A. Corynebacterium diphtheriae: Causes diphtheria, characterized by a thick grayish pseudomembrane on the tonsils and pharynx, but not usually “pus pockets.” Diphtheria also causes systemic symptoms related to its exotoxin, including myocarditis and neuropathy, and is now rare due to vaccination.
- B. Bordetella pertussis: Causes whooping cough, a respiratory infection characterized mainly by paroxysmal coughing, not a sore throat with tonsillar pus.
- C. CA-MRSA (Community-Acquired Methicillin-Resistant Staphylococcus aureus): While MRSA can cause skin and soft tissue infections or abscesses, it is not a common cause of tonsillar exudate or pus pockets in typical pharyngitis. Staphylococcus aureus can cause peritonsillar abscesses but is less common as the primary cause of acute tonsillitis.
- D. Chlamydia trachomatis: This pathogen mainly causes sexually transmitted infections and neonatal conjunctivitis/pneumonia, not tonsillitis in children.
- E. Borrelia burgdorferi: The agent of Lyme disease, which does not cause sore throat or tonsillar pus.
- F. CRO/CRE E. coli: Carbapenem-resistant Enterobacteriaceae (CRE) and carbapenem-resistant organisms (CRO) are antibiotic-resistant bacteria usually causing severe hospital-acquired infections like urinary tract infections or bacteremia, not tonsillitis.
Summary:
The child’s clinical presentation fits a typical streptococcal pharyngitis (strep throat), not any of the infections listed. GAS is the most common bacterial cause of sore throat with tonsillar exudate in children. The options given either do not cause tonsillitis or are rare/unrelated pathogens for this presentation.