成套血培养模式对提高培养阳性率的效果分析

目的:了解成套血培养模式对血流感染病原菌检出率的影响。方法:采用自动血培养仪对2011年全年送检的4855瓶血液标本进行培养,对阳性的标本进行病原菌统计分析。结果:成套血培养瓶送检率为23.5%,阳性率为11.7%;比单瓶阳性率提高了5.6%,差别有统计学意义(P<0.05);成套和单瓶血培养阳性标本检出率最高的均为凝固酶阴性葡萄球菌,分别为23.9%和33.9%,其次均为大肠埃希氏菌,分别为17.9%和25.3%。结论:成套血培养模式具有提高培养阳性率和一定鉴别污染的能力,需常规开展成套血培养送检工作。

Effectiveness analysis of collecting sets of blood cultures in increasing the positive cultures rate

Objective:To evaluate the clinical significance of collecting sets of blood cultures in detection of BSI pathogens.Methods:A total of 4855 bottles of blood culture were performed from the whole year of 2011 using automated detection system,and the pathogens of positive blood culture were analyzed.Results:The submission rate of sets of blood culture bottles was 23.5%,the positive rate was 11.7%,compared with the single-bottle-positive rate,the rate increased by 5.6%,the difference was statistically significant(P<0.05);Coagulase-negative staphylococcus had the highest positive rate in both sets and single-bottle blood culture samples,which were 23.9% and 33.9% respectively,followed by Escherichia coli(17.9%,25.3% respectively).Conclusion:Because collecting sets of blood cultures can significantly increase the isolating rates and distinguish contamination from real bloodstream infection,collecting sets of blood cultures should be recommended.