Fig. 3.
The yolk IgY levels during field trial evaluation of a prototype poultry red mite vaccine containing soluble mite protein extract (SME).
The IgY levels in pooled yolk sampled from hens immunised with SME (Vaccine group, panel A), or adjuvant only (Placebo group, panel B), at weeks 20, 27, 29 and 36 of trial 1, were quantified using an ELISA with SME as coating antigen. The anti-SME IgY levels (represented by A490nm) in the pooled yolk samples are plotted (solid black line) and the PRM populations data from the Vaccine and Placebo groups are overlaid (broken black lines), with the error bars giving the S.E.M.