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Comparison of various anticoagulants. Blood samples anticoagulated with ACD-A, ACD-B, or EDTA were spiked with 5 and 10 CFU/ml of BCG in 5 ml whole blood. The proportion of samples that were positive (bars) and the CT value of the rpoB assay (■) are shown for each condition. The number of replicates run with each anticoagulant type was 4 to 7.
