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Table 8

Effects of shipping (1–3 days) on Legionella quantification in a subset of positive samples by three different methodologies

Relative changea after shipping time delayLab 1 culture (CFU/mL) (n = 60) (%)Delayed on-site qPCR (GU/mL) (n = 32) (%)Lab qPCR (GU/mL) (n = 41) (%)
≥2-Fold degradation 68 72 77 
No change 17 16 13 
≥2-Fold growth 15 13 10 
Relative changea after shipping time delayLab 1 culture (CFU/mL) (n = 60) (%)Delayed on-site qPCR (GU/mL) (n = 32) (%)Lab qPCR (GU/mL) (n = 41) (%)
≥2-Fold degradation 68 72 77 
No change 17 16 13 
≥2-Fold growth 15 13 10 

(χ2p-value = 0.89).

aChanges were determined relative to original on-site qPCR values.

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