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Acridine orange staining as a replacement for subculturing of false-positive blood cultures with the BACTEC NR 660
1Department of Pathology and Laboratory Medicine, Christ Hospital and Medical Center, Oak Lawn, Illinois 60453.
Abstract:
Despite the customization of growth index thresholds within individual laboratories, use of the BACTEC NR 660 automated blood culture system results in a number of false-positive cultures. The results of Gram staining, acridine orange staining, and subculturing to agar media were evaluated on 210 false-positive blood cultures over a 6-month period. Inclusion of acridine orange staining in the routine workup of false-positive blood cultures can eliminate the need for subculturing.
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