Bacteria May Survive Longer in Contact Lens Solution Than Thought04/17/14
THURSDAY, April 17, 2014 (HealthDay News) -- Bacteria that can
cause serious eye infections are able to survive longer in contact
lens cleaning solution than previously known, a new study
Researchers looked at different strains of
Pseudomonas aeruginosa, which can cause microbial keratitis.
This is an inflammation and ulceration of the cornea that can cause
The investigators tested nine strains of
P. aeruginosagathered from hospital patients in Britain and
compared them to
P. aeruginosastrain 9027, which is the standard one used in
tests by makers of contact lens disinfectant solutions.
Most of the strains were killed within 10 minutes after being
placed in the contact lens solution, a result comparable to strain
9027. However, strain 39016 -- which causes more severe cases of
keratitis with a longer healing time -- survived in the solution
for more than four hours.
The findings, scheduled for presentation Wednesday at a Society
for General Microbiology meeting in Liverpool, England, suggest
that tests of contact lens solutions should determine if they can
P. aeruginosastrains, the University of Liverpool
"Microbial keratitis can be devastating for a patient -- it is important that the risk of developing this condition is reduced in contact lens wearers by improving contact lens disinfectant solutions," study leader Craig Winstanley said in a society news release.
Because this study was presented at a medical meeting, it should
be viewed as preliminary until published in a peer-reviewed
Each year in the United Kingdom, there are about 6,000 cases of
microbial keratitis, the news release noted.
The American Academy of Ophthalmology has more about
contact lens-related eye infections.
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