Actinomycosis in Ophthalmology Medication

Updated: May 17, 2021
  • Author: Manolette R Roque, MD, MBA, FPAO; Chief Editor: John D Sheppard, Jr, MD, MMSc  more...
  • Print

Medication Summary

Actinomyces organisms are usually susceptible to penicillins and cephalosporins. Good results have been obtained by subconjunctival penicillin coadministered with systemic iodides. Alternatively, topical sulfacetamide or penicillin can be used.



Class Summary

Empiric antimicrobial therapy must be comprehensive and should cover all likely pathogens in the context of the clinical setting.

Penicillin G (Pfizerpen)

Exerts bactericidal action against penicillin-susceptible microorganisms during the stage of active multiplication. Acts by inhibiting biosynthesis of cell wall mucopeptide, rendering the cell wall osmotically unstable. Not active against penicillinase-producing bacteria, which include many strains of staphylococci

Cefazolin (Ancef, Kefzol, Zolicef)

First-generation cephalosporin with excellent activity against gram-positive cocci, including penicillinase-producing Staphylococcus aureus, penicillinase-producing Staphylococcus epidermidis, group A beta-hemolytic streptococci (Streptococcus pyogenes), group B streptococci (Streptococcus agalactiae), and Streptococcus pneumoniae. Ineffective against Bacteroides fragilis and only weak activity against gram-negative organisms.


Antiparasitic agents

Class Summary

Parasite biochemical pathways are sufficiently different from the human host to allow selective interference by chemotherapeutic agents in relatively small doses.

Sulfacetamide ophthalmic (Sulamyd, Bleph-10)

N-acetyl-substituted derivative; at 30% solution, topical sulfacetamide has pH of 7.4 and has good tissue penetration.