Fig. 3From: Combined use of ELISA and Western blot with recombinant N protein is a powerful tool for the immunodiagnosis of avian infectious bronchitisEvaluation of different batches of rN protein production used as antigen in the indirect ELISA development and tested with positive and negative sera for IBV. Sample 1: strongly reactive positive, samples 2–5: moderately reactive positive and samples 6–9: negative serum samplesBack to article page