Page 334 - The Veterinary Laboratory and Field Manual 3rd Edition

Serology and immunology 303

of innate host responses (Figure 6.1b). Factors line of defence and the associated immune
that influence this first line of defence in the response is often referred to as ‘acquired’ or
immune response include genetic factors, the ‘adaptive’. For the purposes of this chapter we
level of stress such as the presence of concurrent will use the terms ‘non-specific’ and ‘specific’
diseases and the level of challenge. The second immunity.

Figure 6.2(b) Essential features of the immune response. Foreign material is phagocytosed and presented
to other cells of the immune system. This can stimulate a cascade of other responses resulting in (1)
tolerance, (2) antibody production and/or (3) cell-mediated immune response (see also Figure 6.2a). Source:
M. Sarjoon Abdul-Cader, University of Calgary, Canada.

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