Fig. 5

Determination of the detection limit of NDV for the developed fenobody and RANbody-based sandwich ELISA. a Different HA titers (2⁸ to 2⁰) of allantoic fluid containing NDV were detected with the developed sandwich ELISA. b A correlation was established between the developed sandwich ELISA and HA titers by a linear regression. c Different amounts of purified NDV particles were detected with the developed sandwich ELISA. d A correlation was established between the developed sandwich ELISA and amounts of purified NDV particles by linear regression