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. 2020 Sep 28;87(1):1865. doi: 10.4102/ojvr.v87i1.1865

TABLE 5.

Potency test of binary ethylenimine-inactivated Newcastle disease virus vaccine formulated in black seed oil as adjuvant.

Dilution Number of protected chickens/Number of chickens Number of non-protected chickens Cumulative
% protection
Protected Non-protected Total
1/25 (10−8.076) 18/20 2 45 2 47 95
1/50 (10−7.775) 16/20 4 27 4 33 81
1/100 (10−7.474) 11/20 9 11 9 26 42

PD60 = 7.612923077 = (10−7.612)