Theory question 108
Animal Health(a) Define the term "disease"
(b) State the difference between resistance and susceptibility to diseases.
(c) Enumerate four economic importance of animal diseases.
(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.
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(a) Disease is any condition in which the normal functioning of the animal's body is disturbed, shown by signs such as fever, poor appetite or poor production
(b) Resistance is the ability of an animal to withstand attack by disease organisms; susceptibility is being easily attacked by them (lack of resistance)
(c) Any four: deaths of animals; lower production (meat, milk, eggs); cost of treatment and vaccines; poor quality products/lower market value; some diseases spread to man (zoonoses); infertility and abortion; loss of income
(d) Any three: age; breed/heredity; nutrition; previous infection or vaccination (immunity); health status/stress; sex; environment and management
(e) Any three: high temperature (heat, boiling, sterilising); disinfectants and chemicals; sunlight/ultraviolet light; drying; antibiotics and drugs; extreme pH
Short definitions, then lists.