Purulent conjunctivitis is characterized as violent acute conjunctival inflammation, great swelling of lids, copious secretion of pus, and a marked tendency to corneal involvement and even possible loss of the eye.

1. Gram-positive group

 A. Bacillus of Doderlein (Lactobacillus sp.)
 B. Listeria monocytogenes
 *C. Pneumococcus
 D. Staphylococcus
 *E. Streptococcus

2. Gram-negative group

 A. Aerobacter aerogenes
 B. Enterobacteriaceae
 C. Escherichia coli
 *D. Haemophilus influenzae biotype III
 E. Klebsiella pneumoniae
 F. Moraxella lacunata
 *G. Neisseria gonorrhoeae
 H. Neisseria meningitidis
 I. Proteus species
 J. Pseudomonas species
 K. Serratia marcescens

3. Vaccinia virus
4. Fungus

 A. Actinomyces species
 B. Candida species
 *C. Nocardia species

5. Wiskott - Aldrich syndrome- x-linked

Fedukowicz HB. External infections of the eye: bacterial, viral, mycotic, 3rd ed. New York: Appleton-Century-Crofts, 1984.

Roy FH. Ocular syndromes and systemic diseases, 3rd ed. Philadelphia: Lippincott Williams & Wilkins, 2002.

Snead JW, et al. Listeria monocytogenes endophthalmitis. Am J Ophthalmol 1977; 84:337-344.