. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Clin Transplant. 2014 Nov 13;28(12):1416–1423. doi: 10.1111/ctr.12473

Table 2.

Summary of Qualitative Performance for CMV Viral Load Testing

CMV – Commercial panel - Single replicate of each dilution at each site
*Expected copies/ml (log10 copies/ml)*	*Negative*	*Positive^	*Quantifiable*	*Mean (log₁₀ copies/ml)*	*Range (log₁₀ copies/ml)*
0	5
500 (2.7)	1	4
5000 (3.7)		1	4	3.34	3.07–3.52
50,000 (4.7)			5	4.26	4.01–4.49
500,000 (5.7)			5	5.19	4.94–5.53
CMV – WHO International Standard, three replicates of each dilution at each site
*Expected IU/ml (log10 IU/ml)*	*Negative*	*Positive^	*Quantifiable*	*Mean (log₁₀ copies/ml)*	*Range (log₁₀ copies/ml)*
0	15
5 (0.7)	13	2
50 (1.7)	10	5
500 (2.7)		12	3	2.42	2.27–2.52
5000 (3.7)		1	14	3.46	3.23–3.81
50,000 (4.7)			15	4.54	4.33–4.85
500,000 (5.7)			15	5.61	5.36–5.81

Positive but below the reportable range