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2003
OMIG, Abstract 18
OMIG
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The
Microbial Flora From Explanted Punctal Plugs
Sarkis H.Soukiasian. Department of Ophthalmology, Lahey Clinic,
Burlington, MA
Purpose:
To describe the microbial flora from explanted silicone
punctal plugs.
Methods: Retrospective review of microbial cultures
of 20 punctal plugs explanted from 16 symptomatic patients for a
variety of reasons including discomfort, epiphora, conjunctival
injection, worsening keratitis, and mucoid discharge.
Results: Positive cultures were obtained from 19
plugs (95%). A single organism was identified from 10 plugs, with
9 plugs having more than one organism. Ps. aeruginosa (Ps.) being
the most frequent isolate in 35%(7). The next most common isolates
were S. aureus (20%(4)), CNS (15%(3)) and alpha hemolytic strep
(15%(3)). Other organisms identified included Serratia (10%(2)),
Stenotrophomonas (10%(2)), and single cases of Klebsiella, Moraxella,
Aspergillus, Candida and Citrobacter.
Conclusion: A high incidence of Ps. and other gram
negative organisms was identified. This may be due to colonization
by potential pathogenic species with the formation of bacterial
biofilm on punctal plugs and may account for clinical symptoms and
findings.
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