Crede's method is used to prevent neonatal conjunctivitis caused by which organism?

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Crede's method is neonatal eye prophylaxis designed to prevent ophthalmia neonatorum, a severe infection of the newborn’s eyes caused by Neisseria gonorrhoeae. Instilling a small amount of a topical antimicrobial at birth creates a protective barrier, quickly acting in the conjunctival sac to kill or inhibit gonococci as the baby passes through the birth canal. This targeted prevention is why Neisseria gonorrhoeae is the organism associated with Crede’s method. While other bacteria like Staphylococcus aureus, Escherichia coli, and Streptococcus pyogenes can cause conjunctivitis in newborns, the historical and primary purpose of Crede’s prophylaxis is to guard against gonorrheal infection. Modern practice often uses alternative agents (like erythromycin) with similar protective goals, but the principle remains preventing gonococcal conjunctivitis right after birth.