Refrigerated (preferred) - 7 days
Frozen - 7 days
Ambient - NO
Frozen (preferred) - <7 days
Rapid Polymerase Chain Reaction (PCR)
A positive polymerase chain reaction (PCR) result for the presence of a specific sequence found within the Legionella 5S rRNA gene indicates the presence of a Legionella species DNA, which may be due to Legionella infection or environmental/water Legionella DNA in the specimen.
A negative PCR result indicates the absence of detectable Legionella DNA in the specimen, but does not rule-out legionellosis as false-negative results may occur due to inhibition of PCR, sequence variability underlying the primers and probes, or the presence of Legionella species in quantities less than the limit of detection of the assay.