title: In Vitro Antimicrobial Long-Term Evaluation of Corneal Preservation Media Against Microorganisms Using A Closed-Chamber Study Model.
abstract: OBJECTIVE
  To evaluate the existence of in vitro long-term antimicrobial activity of Optisol-GS against microorganisms related to corneal infection using a closed-chamber study model.
  
  
  METHODS
  Optisol-GS was contaminated with microorganisms related to corneal infections, and different times after contamination was analyzed using a closed-chamber study model. Microbial growths were analyzed by macroscopic observation.
  
  
  RESULTS
  For Staphylococcus aureus and Pseudomonas aeruginosa, bacterial growth was observed in samples taken 1 hour through 7 days and 14 days after contamination occurred. For Staphylococcus epidermidis, Streptococcus agalactiae, and Candida albicans, microbial growth was observed in all samples studied. For Streptococcus pneumoniae, bacterial growth was observed in samples taken 1 hour through 72 hours after contamination. For Streptococcus pyogenes, bacterial growth was observed in samples taken 1 hour through 7 days after contamination. For Escherichia coli, bacterial growth was observed in samples taken 1 hour through 48 hours after contamination occurred.
  
  
  CONCLUSIONS
  We conclude that no in vitro antimicrobial effect for any microorganism analyzed was observed in contaminated Optisol-GS after 72 hours; however, effective antimicrobial activity was observed for S. aureus, Str. pneumoniae, Str. pyogenes, P. aeruginosa, and E. coli after 7 to 10 days.
authors: *Department of Ophthalmology, Santa Casa de São Paulo, São Paulo, Brazil; †Department of Ophthalmology, Hospital das Clínicas of University of São Paulo, São Paulo, Brazil; and ‡Department of Microbiology, Santa Casa de São Paulo, São Paulo, Brazil.
authors: Diego R
authors: DR
authors: Hoshino Ruiz
authors: Davi Chen
authors: DC
authors: Wu
authors: Ricardo
authors: R
authors: Holzchuh
authors: Lycia M J
authors: LM
authors: Mimica
authors: Cely B
authors: CB
authors: Silva
authors: Richard Y
authors: RY
authors: Hida
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development; D002809:Chondroitin Sulfates / Q000494:pharmacology*; D045424:Complex Mixtures / Q000494:pharmacology; D003315:Cornea; D003911:Dextrans / Q000494:pharmacology*; D015194:Diffusion Chambers, Culture; D005658:Fungi / Q000187:drug effects* / Q000254:growth & development; D005839:Gentamicins / Q000494:pharmacology*; D009926:Organ Preservation; D019188:Organ Preservation Solutions / Q000494:pharmacology*; D013307:Streptomycin / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D045424:Complex Mixtures; D003911:Dextrans; D005839:Gentamicins; D019188:Organ Preservation Solutions; D002809:Chondroitin Sulfates; C075736:Optisol; D013307:Streptomycin