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Risk factors for aerobic bacterial conjunctival flora in preoperative cataract patients.
Eye 2016 November
PurposeTo investigate the relationship between the background of preoperative cataract patients and bacterial conjunctival flora.MethodsA total of 990 cataract patients who had completed preoperative examinations in 2007 and 2008 were included. Patients using topical antibiotics at the preoperative examination or having a history of intraocular surgery were excluded. Conjunctival cultures had been preoperatively obtained. Patient characteristics were investigated via medical records. Risk factors for conjunctival flora of seven typical bacteria were analyzed by univariate and multivariate analyses.ResultsThe detection rate of alpha-hemolytic streptococci and Enterococcus faecalis increased with age (P=0.044 and P=0.002, respectively). The detection rate of Gram-negative bacilli was higher among patients with oral steroid use or lacrimal duct obstruction (P=0.038 and P=0.002, respectively). The detection rate of Corynebacterium species was higher among older patients and men, and lower among patients with glaucoma eye drop use (P<0.001, P=0.012 and P=0.001, respectively). The detection rate of methicillin-susceptible coagulase-negative Staphylococci was higher among men and lower among patients with a surgical history in other departments (P=0.003 and P=0.046, respectively). The detection rate of methicillin-resistant coagulase-negative Staphylococci (MR-CNS) was higher among patients with oral steroid use, a visit history to ophthalmic facilities, or a surgical history in other departments (P=0.002, P=0.037 and P<0.001, respectively).ConclusionsElderly patients, men, patients with lacrimal duct obstruction or immunosuppressed patients are more likely to be colonized by pathogens that cause postoperative endophthalmitis. Moreover, MR-CNS colonization was associated with healthcare-associated infection.
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