Types of Immunity
Immunity: Resistance offered by host against the micro organisms/Foreign substance Types: 1.Innate immunity: Present right from birth; Respond to microbial antigens shared by multiple microbes Components: 1.Anatomical barriers 2.Physiological barriers 3.Phagocytes 4.NK cells 5.Mast cells 6.Dendritic cells 7.Complement pathway (Alternate pathway and Mannose Pathway) 8.Fever and inflammatory response 9.Cytokines-TNF,Interleukins(IL 1,IL 6,IL 8,IL 12,IL 16,IL 18),IFN alpha,beta,TGF beta 10.Acute phase reactant proteins 2.Adaptive/Acquired immunity : Resistance against infecting foreign substance that an individual acquires /adapts during his life Types: (i) Active: Produced actively by host immune respone Infection(Natural) Vaccination(Artificial) Long Lasting Lag phase present Memory present
