TABLE 1

Major categories of endophthalmitis

CategoryRisk factorRelative frequency (% of all endophthalmitis cases)Major pathogens
Acute postcataractCataract surgery40–80Coagulase-negative staphylococci (70% of cases), Staphylococcus aureus (10%), streptococci (9%)
PostinjectionIntravitreal injection0–50Coagulase-negative staphylococci, streptococci
PosttraumaticPenetrating eye trauma2–15Coagulase-negative staphylococci, Bacillus, streptococci, Gram-negative bacilli, fungi
Bleb relatedFiltering bleb (for glaucoma)0–5 Streptococcus pneumoniae and other streptococci, enterococci, Haemophilus influenzae
Keratitis relatedCorneal infection0–10Fungi (Aspergillus, Fusarium) in 50%, S. aureus, streptococci, Pseudomonas
EndogenousBacteremia or fungemia0–20 Klebsiella pneumoniae (especially in East Asian nations), Candida, streptococci, S. aureus, Escherichia coli