Effect of antibiotic prophylaxis on Coagulase-negative Staphylococcus virulence factor profiles in patients undergoing cataract surgery
Purpose ::: In this prospective study, multiplex polymerase chain reaction (PCR) was used to identify genes encoding virulence factors (ica, atlE and mecA) in Coagulase-negative Staphylococcus (CNS) isolates from the ocular microbiota of patients undergoing cataract surgery and to investigate possible changes in the CNS profile due to antibiotic prophylaxis.
Corrosion and protection of the underwater steel structures for W114A platform were investigated.The offshore platform has been in service in the South China Sea for 15 years.It was found that the bio-fouling was serious and the maximum attachment thickness was 20cm,while,the cathodic protection system was normal and the protective effect was favorable.After analyzing the detective methods and their results,some problems were found.The program of potential detection was inappropriate,the detection method for physical size of the sacrificial anodes was inaccurate,and the base surface of the thickness measurement points was not clean;therefore,the cathodic protective effect could not be accuraely evaluated.To solve these problems,some valuable suggestions are put forward accordingly.