The most common etiologic agent in keratitis associated with contaminated contact lens cleaning solutions is which organism?

The most common etiologic agent in keratitis associated with contaminated contact lens cleaning solutions is which organism?

• A. Chiyseobacterium meningosepticum
• B. Pseudomonas aeruginosa
• C. Francisella tularensis
• D. Escherichia coli

Answer: (B)

Pseudomonas aeruginosa is the organism most often implicated in keratitis linked to contaminated contact lens cleaning solutions. It thrives in aquatic environments and readily colonizes contact lenses and lens cases, making it a common contaminant of lens care products. Once on the lens, it adheres strongly and can form biofilms that resist disinfection, allowing it to reach the cornea quickly. On the eye, Pseudomonas is highly virulent and can cause rapid, aggressive corneal ulcers with potential thinning or perforation if not treated promptly. This combination of environmental ubiquity, penchant for lens-associated surfaces, and aggressive corneal damage explains why it is the classic cause in this scenario. The other organisms listed are much less commonly linked to keratitis from contaminated lens solutions.

Pseudomonas aeruginosa is the organism most often implicated in keratitis linked to contaminated contact lens cleaning solutions. It thrives in aquatic environments and readily colonizes contact lenses and lens cases, making it a common contaminant of lens care products. Once on the lens, it adheres strongly and can form biofilms that resist disinfection, allowing it to reach the cornea quickly. On the eye, Pseudomonas is highly virulent and can cause rapid, aggressive corneal ulcers with potential thinning or perforation if not treated promptly. This combination of environmental ubiquity, penchant for lens-associated surfaces, and aggressive corneal damage explains why it is the classic cause in this scenario. The other organisms listed are much less commonly linked to keratitis from contaminated lens solutions.