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Table 3 Results of the collaborative study using the national standard (National Institute of Food & Drug Safety Evaluation, code no. 08/027) by year and method. The results of the virus content testing were compared to the test results of each collaborative study during 2009 ~ 2013 (titer unit: log10PFU/ dose)

From: Standardization of the methods and reference materials used to assess virus content in varicella vaccines

Method

Experiment

Result

Nd

Meane ± SDf

95 % CIg

PSMa

CSVc 2012

41

4.50 ± 0.14

−0.01, 0.09

CSVc 2013

40

4.46 ± 0.14

AOMb

CSVc 2009

25

4.26 ± 0.09

−0.15, 0.12

CSVc 2013

40

4.27 ± 0.34

  1. a PSM, Plaque staining method
  2. b AOM, Agar overlay method
  3. c CVA, Collaborative study for Varicella national standard material
  4. d N, Number of tests
  5. e Mean, Geometric mean titer
  6. f SD, Standard deviation
  7. g CI, confidence interval
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Virology Journal

ISSN: 1743-422X