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. Author manuscript; available in PMC: 2016 Mar 15.
Published in final edited form as: Vaccine. 2012 Feb 11;30(15):2516–2522. doi: 10.1016/j.vaccine.2012.01.090

Figure 1.

Figure 1

Detection of ferret anti-NA antibodies against different NA antigens by the miniaturized colorimetric NI assay. One serum sample from each of the pre-immune (pre) and post-immune ferret groups (anti-CA09, anti-HK03, or anti-SD07) was serially diluted and incubated with H6 reassortants bearing NA antigens from CA09 (A), HK03 (B) or SD07(C). Fetuin substrate was added and NA activity was tested. The OD550 value compared to that of the virus control (%) at each serum dilution was determined and plotted. The data represent the average of duplicate experiments and the standard error is indicated for each data point.