(a) Define the term "disease." (b) State the difference between resistance and susceptibility to diseases. (c) Enumerate four economic importance of animal ...

(a) Define the term "disease." (b) State the difference between resistance and susceptibility to diseases. (c) Enumerate four economic importance of animal disease. (d) List three factors which determine the degree of resistance of an animal to a disease. (e) Outline three conditions that may inactivate a pathogenic organism.