title: Positive bacterial culture in conjunctival sac before cataract surgery with night stay is related to diabetes mellitus.
abstract: BACKGROUND
  The aim of this study is to elucidate background clinical factors in patients with positive bacterial culture for the conjunctival sac before cataract surgery in Japan.
  
  
  METHODS
  Retrospective review was made on medical records of 576 consecutive patients who underwent conjunctival sac culture before cataract surgery with night stay at a hospital in 2 years from January 2013 to December 2014. In the patients with sequential bilateral surgeries, the data were chosen for bacterial culture in the eye which had earlier surgery. The age at surgery ranged from 33 to 100 years (mean, 76.7 years). Clinical factors, analyzed in relation with positive or negative bacterial culture, included the sex, the age, the presence of hypertension or diabetes mellitus, history of cancer, and history of hospital-based surgery at other specialties.
  
  
  RESULTS
  Bacterial culture of the conjunctival sac was positive in 168 patients while negative in 408 patients. In multiple regression analysis, the positive bacterial culture was related with the older age (P = 0.01), the presence of diabetes mellitus (P = 0.004), and the history of hospital-based surgery at other specialties (P = 0.001).
  
  
  CONCLUSIONS
  Elderly patients with diabetes mellitus or previous hospital-based surgeries at other specialties have a higher rate of positive bacterial culture in the conjunctival sac before cataract surgery. This study would provide a hint for identifying patients at risk for carrying bacterial flora in the conjunctival sac.
authors.affiliation: Department Ophthalmology, Okayama University Medical School and Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama City, 700-8558, Japan.|Department of Ophthalmology, Fukuyama City Hospital, Fukuyama City, Japan.
authors.forename: Tetsuhiro
authors.initials: T
authors.lastname: Kawata
authors.affiliation: Department of Ophthalmology, Fukuyama City Hospital, Fukuyama City, Japan. matsuot@cc.okayama-u.ac.jp.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Matsuo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001419:Bacteria / Q000302:isolation & purification*; D002386:Cataract / Q000150:complications*; D002387:Cataract Extraction; D003228:Conjunctiva / Q000382:microbiology*; D003231:Conjunctivitis / Q000150:complications / Q000175:diagnosis / Q000382:microbiology*; D003920:Diabetes Mellitus; D015818:Eye Infections, Bacterial / Q000150:complications / Q000175:diagnosis / Q000382:microbiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D057234:Preoperative Period; D012189:Retrospective Studies
keywords: Cataract surgery; Conjunctival sac culture; Diabetes mellitus; History of cancer; History of hospitalization