Allergic to Penicillin, Positive Screen - Obstetrics & Gynecology clinical simulation case. The patient is a 28-year-old G2P1 in active labor at 39+2...
Age: 45 • Setting: Outpatient Consultation
Clinical Presentation & History
The patient is a 28-year-old G2P1 in active labor at 39+2 weeks. Vaginal-rectal swab at 36 weeks grew Group B Streptococcus. She reports a childhood rash with amoxicillin. You need to clarify the nature of that reaction before ordering intrapartum prophylaxis.
Differential Diagnoses to Consider
Primary differential diagnoses evaluated in this clinical scenario:
High-risk anaphylactic penicillin allergy requiring vancomycin for prophylaxis
Confirmed anaphylaxis history; clindamycin is the only acceptable alternative
Patient is not truly allergic; proceed with full-dose penicillin G
High-Yield Clinical Pearls
Maintain a systematic approach from history taking to definitive intervention.
Diagnostic stewardship minimizes patient harm and diagnostic delay.
Diagnostic Pitfalls & Cognitive Error Warnings
Key reasoning traps and premature closure risks associated with this presentation:
Premature closure without complete investigation carries high diagnostic error risk.
Test Your Clinical Reasoning in Real Time
Step into the active clinician role for this case. Order diagnostic tests, analyze live laboratory panels, and navigate branching clinical decisions with real-time feedback.