VMC 221: Veterinary Immunology and Serology (1+1)

INTRODUCTION- HYPERSENSITIVITY

• Antigen when enters into a body it leads to development of immunity or may cause an allergic reaction and results in tissue damage. This undesirable effect of tissue damage is known as Hypersensitivity.
• Antigen antibody reaction may be beneficial by development of immunity (prophylaxis) or harmful to produce hypersensitivity.
• Hypersensitivity is a specific and acquired altered reactivity of the body tissues to a foreign substance (antigen or haptens) producing deleterious effects on the tissues and rendering the host abnormally sensitive to substance which are ordinarily considered innocuous.