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(P0.05);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.