“…The variation seen in the response is probably because this route does not represent true stimulation of the mucosal surface (Bourne et al, 1978). The data from all these studies does, however, suggest that much of the milk antibody, be it IgA or IgG, is synthesised within the mammary gland (Genco & Taubman, 1969;McDowell, 1973;Bourne et al, 1975) and it appears to be a more efficient way of inducing milk antibody than systemic immunisation , although the variability of response and the trauma associated with the procedure makes it impractical as anything other than an experimental procedure.…”