TOPICS: Haemophilus Influenzae, bacteria, gram negative, IgA protease, chocolate agar, factor 5, factor 10, PRP capsule, polyribosylribitol phosphate polysaccharide capsule, typeable, nontypeable, serotype b, Hib, epiglottitis, thumb sign, septic arthritis, meningitis, ceftriaxone, rifampin prophylaxis, aerosolized transmission, sinusitis, acute otitis media, conjunctivitis, amoxicillin, clavulanate