## Drug of Choice for H. influenzae Epiglottitis **Key Point:** Ceftriaxone is the first-line agent for invasive H. influenzae infections, including epiglottitis, meningitis, and bacteremia, especially in children. ### Why Ceftriaxone? 1. **Spectrum & Penetration** - Third-generation cephalosporin with excellent CNS and epiglottic tissue penetration - Covers both ampicillin-susceptible and ampicillin-resistant H. influenzae (BLNAR strains) - Bactericidal activity essential in life-threatening infections 2. **Clinical Efficacy** - Superior outcomes in epiglottitis compared to older agents - Achieves therapeutic levels in inflamed tissues - Rapid bacterial clearance reduces airway obstruction risk **High-Yield:** Epiglottitis is a medical emergency requiring: - Immediate airway management (intubation if stridor present) - IV ceftriaxone 50–80 mg/kg/day (max 4 g/day) in divided doses - Dexamethasone to reduce inflammation - Blood cultures before antibiotics ### Comparison with Alternatives | Agent | Issue | Why Not First-Line | |-------|-------|-------------------| | Amoxicillin | Resistance common (20–40% BLNAR in India) | Unreliable coverage; risk of treatment failure | | TMP-SMX | Older agent; variable CNS penetration | Inferior to cephalosporins; less bactericidal | | Fluoroquinolone | Not first-line in children | Reserved for resistant cases; concerns about cartilage toxicity in pediatrics | **Clinical Pearl:** In resource-limited settings where ceftriaxone availability is uncertain, chloramphenicol (if available) or fluoroquinolone may be used, but ceftriaxone remains the gold standard. [cite:Harrison 21e Ch 139]
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