Question

A 3-year-old child presents with jaw pain and swelling, diagnosed as an apical abscessThe child has a known severe allergy to penicillinWhich antibiotic should be preferred for treatment in this case?

• A. Cefuroxime
• B. Clindamycin
• C. Amoxicillin
• D. Erythromycin

Hint:

Penicillin allergy in dental infections → Preferred alternative → Clindamycin.

Answer 1

The Correct Option is B

To determine the appropriate antibiotic for a 3-year-old child with an apical abscess and severe allergy to penicillin, we must consider the mechanism of action and cross-reactivity of each option given. Here is a step-by-step rationale:

1. Understanding Apical Abscess: An apical abscess is a dental condition marked by inflammation and infection at the tip of the tooth's root, often needing antibiotic intervention.
2. Evaluating Antibiotics:
   • Cefuroxime: This cephalosporin has a low risk of cross-reactivity with penicillin allergies but is still possible as both are β-lactams. Avoid if severe allergy exists.
   • Clindamycin: A lincosamide antibiotic, not a β-lactam, thus no cross-reactivity with penicillin. Effective for oral infections.
   • Amoxicillin: A penicillin derivative, contraindicated in penicillin-allergic patients.
   • Erythromycin: A macrolide, viable in penicillin allergy cases, but less preferred due to gastrointestinal side effects and variable activity against oral pathogens.
3. Decision: Given the child’s severe allergy to penicillin, Clindamycin is preferred because it avoids cross-reactivity while being effective against dental infections like apical abscesses.
4. Conclusion: The best antibiotic option for treating the child’s dental abscess is Clindamycin due to its safety profile in penicillin-allergic patients and efficacy in treating dental infections.