Abstract
To identify characteristics of patients undergoing cataract surgery associated with pathogenic and antibiotic-resistant conjunctival bacteria. Spanish tertiary hospital. Retrospective cross-sectional study. Records of consecutive patients undergoing cataract surgery between July 2005 and September 2014, contained data on patient characteristics and conjunctival bacteria systematically identified with preoperative tests and anesthetic evaluation. A multivariate logistic regression associated 12 bacterial groups with every category of 17 characteristics. Odds ratio (OR), 95% CIs expressed colonization risk. In 14883 patients, categories associated with pathogenic bacteria were age older than 79 years with nonfermentative gram-negative bacilli (NFGNB) (OR 1.74, 1.12-2.71), enterococci (OR 1.90, 1.36-2.65), Enterobacteriaceae (OR 2.17, 1.65-2.87), and Staphylococcus aureus (OR 1.37, 1.16-1.62); obesity with S aureus (OR 1.52, 1.30-1.78), enterococci (OR 1.99, 1.47-2.68), and Enterobacteriaceae (OR 2.17, 1.70-2.77); dacryocystorhinostomy history with S aureus (OR 1.90, 1.48-2.44), Haemophilus spp. (OR 2.06, 1.37-3.11), Streptococcus pneumoniae (OR 3.14, 2.14-4.62), NFGNB (OR 2.23, 1.28-3.88), and enterococci (OR 1.80, 1.16-1.81); diabetes with S aureus (OR 1.27, 1.13-1.44), enterococci (OR 1.49, 1.19-1.87), and Enterobacteriaceae (OR 1.27, 1.04-1.54); smoking habit with Enterobacteriaceae (OR 2.11, 1.56-2.86); autumn with NFGNB (OR 2.0, 1.35-3.0); hot weather with S aureus (OR 1.23, 1.03-1.47); and lung, renal, and some heart insufficiencies with S aureus. Other staphylococci, highly antibiotic-resistant, were associated with old age, obesity, and hot weather. Old age, obesity, diabetes, dacryocystorhinostomy history, smoking habit, and autumn and summer seasons increased the prevalence of enterococci, staphylococci, Enterobacteriaceae, and/or NFGNB. Obesity and humid-warm weather are key for choosing a cataract surgery prophylaxis.
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