Journal article

Comparison of contamination rates of catheter-drawn and peripheral blood cultures

ES McBryde, M Tilse, J McCormack

JOURNAL OF HOSPITAL INFECTION | W B SAUNDERS CO LTD | Published : 2005

Abstract

The aim of this study was to assess the sensitivity and specificity of catheter-drawn and peripheral blood cultures. Paired blood culture samples collected over a 44-month period from a 280 bed Brisbane metropolitan hospital were analysed, using standard clinical and microbiological criteria, to determine whether blood culture isolates represented true bacteraemias or contamination. Catheter-collected cultures had a specificity of 85% compared with 97% for peripheral cultures. In only two instances (0.2%) was the diagnosis of clinically significant bacteraemia made on the basis of catheter culture alone. This study concluded that catheter-collected samples are not a good test for true bacter..

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