Ocular streptococcal infections: A clinical and microbiological review.

Streptococcus is a diverse bacterial genus that is part of the ocular surface microbiome implicated in conjunctivitis, keratitis, endophthalmitis, dacryocystitis, and orbital cellulitis that can lead to decreased visual acuity and require surgical intervention. The pathophysiology of S. pneumoniae is well-established and the role of the polysaccharide capsule, pneumolysin, neuraminidases, and zinc metalloproteinases in ocular infections described.