Analysis of bacterial culture results in conjunctival sacs of cataract patients before operation

Objective To analyze the shifting trends of the results of bacterial culture and antibiotics sensitivity tests in conjunctival sacs of cataract patients before operation in recent years.Methods 1733 specimens from the conjunctival sacs of cataract patients in Shandong Eye Institute and Hospital from January 2000 to March 2004 were cultured before operation,and the positive specimens were carried out antibiotics sensitivity tests.Results The number of positive specimens of bacterial culture in non-infectious cataract patients before operation is 894(51.6%)from 1733 specimens.Gram-positive cocci(G~+C,81.4%)and Gram-negative bacilli(G~-B,12.9%)constitute predominant bacteria in the conjunctival sacs of cataract patients before operation.Staphylococcous epidermidis(54.7%)and Staphylococcous aureus(10.3%)was mostly isolated and they trend to increase gradually.The percentage of Gram-negative bacilli kept stable(about 13%).The resistant rate of these bacteria to Tobramycin,Ciprofloxacin,and Ofloxacin is increasing.The resistant rate to Gentamicin has decreased.Conclusions G~+C and G~-B constitute mostly common bacteria in the conjunctival sacs of cataract patients before operation.The percentage of G~+C trends to increase and G~-B keeps stable.The resistant rate of these bacteria to Tobramycin,Ciprofloxacin,and Ofloxacin increases.The resistant rate to Gentamicin decreases.