The Investigation And Prevention Of The Contamination Of Intensive Care Unit's Information System

ObjectiveIn order to provide valid reference for the control of nosocomial infection, we investigated the distribution and drug resistance status of pathogenic bacteria in the intensive care unit's (ICU) information system(computers'keyboards and mouse, and intercommunication system's control buttons and telephone receiver) and nursing and medical staffers'hands.MethodsWe took samples from nursing and medical staffers' hands and all computers' keyboards and mouse, and the intercommunication system's control buttons and telephone receiver in the ICU of Chongqing medical university's affiliated children's hospital continuously from September 14th, 2009 to September 20th 2009. All samples were cultivated normatively, and drug sensitiveness tests were done when pathogenic bacteria were isolated.Results 1. 175 samples were collected in the week, and 21 of them had pathogenic bacteria. The positive rate was 14.0%. Among the 20 positive samples, 10 samples were taken from nursing and medical staffers' hands; 7 samples were collected from computers' keyboards and mouse; 4 samples were taken from the intercommunication system's control buttons and telephone receiver.2. Three species of pathogenic bacteria were found from the 21 positive samples. All of them were Gram-positive. 19 strains were Staphylococcus haemolyticus; 1 strain was Staphylococcus aureus; 1 strain was Staphylococcus xylosus. The Staphylococcus haemolyticus was fround from computers,telephones and medical staffers' hands.The Staphylococcus aureus was take frome computers' keyboards and mouse .The last one was isolated from medical staffers' hands.3. 13 strains of Staphylococcus haemolyticus were methicillin-resistant Staphylococcus(MRSH), and those bacteria was highly resistant to 20 antibiotics than meticillin-sensitive Staphylococcus(MSSH).4. All bacteria were susceptible to vancomycin, linezolid,teicoplanin, rifampicin, tetracycline, furadantin, amikacin, and quinupristin/dalfopristin. The sensitive rates of trimethoprim and piperacillin were 14.3%. The resistant rate of ampicillin is 71.4%, it is the highest among the 20 antibiotics. 5.The Staphylococcus haemolyticus'drug resistant and MRS'detectable rate are lower than the hospital's averge rate in 2009.Conclusions1. The contamination of the intensive care unit's information system deserves more attention. It may be additional reservoirs for the transmission of microorganisms and become vectors for cross-transmision of nosocomial infections in the ICU settin. It should be sterilized regularly to lower the risk of cross-infection.2. The nursing and medical staffers should realize that the bacteria on their hands would cause nosocomial infections. All nursing and medical staffers should performe hand hygiene or wear gloves before and after each procedure and before using the information system.