title: Contact lens disinfecting solutions antibacterial efficacy: comparison between clinical isolates and the standard ISO ATCC strains of Pseudomonas aeruginosa and Staphylococcus aureus.
abstract: OBJECTIVE
  To evaluate the disinfectant properties of the three multipurpose contact lens disinfecting solutions available in Iran, against clinical isolates and the standard ISO ATCC strains of Pseudomonas aeruginosa and Staphylococcus aureus, based on the international organization for standardization (ISO) 14729 guidelines.
  
  
  METHODS
  Three multipurpose solutions that were tested were ReNu Multiplus, Solo Care Aqua and All-Clean Soft. The test solutions were challenged with clinical isolates and the standard strains of P. aeruginosa(ATCC 9027) and S. aureus(ATCC 6538), based on the ISO Stand-alone procedure for disinfecting products. Solutions were sampled for surviving microorganisms at manufacturer's minimum recommended disinfection time. The number of viable organisms was determined and log reductions calculated.
  
  
  RESULTS
  All of the three test solutions in this study provided a reduction greater than the required mean 3.0 logarithmic reduction against the recommended standard ATCC strains of P. aeruginosa and S. aureus. Antibacterial effectiveness of Solo Care Aqua and All-Clean Soft against clinical isolates of P. aeruginosa and S. aureus were acceptable based on ISO 14729 Stand-alone test. ReNu MultiPlus showed a minimum acceptable efficacy against the clinical isolate of S. aureus, but did not reduce the clinical isolate by the same amount.
  
  
  CONCLUSIONS
  Although the contact lens disinfecting solutions meet/exceed the ISO 14729 Stand-alone primary acceptance criteria for standard strains of P. aeruginosa and S. aureus, their efficacy may be insufficient against clinical isolates of these organisms.
authors.affiliation: Department of Optometry, Shahid Beheshti University of Medical Science, Tehran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Mohammadinia
authors.forename: S
authors.initials: S
authors.lastname: Rahmani
authors.forename: G
authors.initials: G
authors.lastname: Eslami
authors.forename: M
authors.initials: M
authors.lastname: Ghassemi-Broumand
authors.forename: M
authors.initials: M
authors.lastname: Aghazadh Amiri
authors.forename: Gh
authors.initials: G
authors.lastname: Aghaie
authors.forename: S M
authors.initials: SM
authors.lastname: Tabatabaee
authors.forename: S
authors.initials: S
authors.lastname: Taheri
authors.forename: A
authors.initials: A
authors.lastname: Behgozin
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D015169:Colony Count, Microbial; D018639:Contact Lens Solutions / Q000494:pharmacology* / Q000592:standards; D003261:Contact Lenses / Q000382:microbiology; D004203:Disinfection / Q000379:methods* / Q000592:standards; D006801:Humans; D008826:Microbial Sensitivity Tests; D011550:Pseudomonas aeruginosa / Q000187:drug effects*; D013211:Staphylococcus aureus / Q000187:drug effects*; D013997:Time Factors
chemical_list: D000900:Anti-Bacterial Agents; D018639:Contact Lens Solutions
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