Bacterial spectrum in conjunctival sacs of cataract patients before operation and its sensitivity to drugs

Objective To investigate the bacterial spectrum and its sensitivity to drugs in conjunctival sacs of cataract patients before operation.Methods A total of 398 specimens from the conjunctival sacs of cataract patients were cultured before operation,and the positive specimens were subjected to clinical antibiotic sensitivity tests.Results Totally 113 of 398(28.4%) eyes showed positive results in the bacterial culture tests.Gram-positive(G+) bacteria were the dominant(92.9%) in the conjunctival sacs of cataract patients before operation,with G+ coccus occupying 87.6% and G+ bacilli occupying 5.3%.G+ coccus included Staphylococcus epidermidis(72.6%),Staphylococcus aureus(6.2%) and microccoccus(7.1%).Gram-negative(G-) bacteria accounted for 7.1%.Most bacteria were sensitive to Ofloxacin,Tobramycin,Vancocin,Rifampicin and Levofloxacin.Conclusion Staphylococcus epidermidis is the most frequently seen bacterium in the conjunctival sac of eyes before cataract surgery.Ofloxacin,Tobramycin,Rifampicin and Levofloxacin are the first choice to avoid post-operation infection.