Functions of antibodies
Neutralization of toxin
Promotion of phagocytosis
The cell mediated response It is important in killing of intracellular pathogenic bacteria. T-lymphocytes are population of lymphocytes conferring cell mediated immunity due to release of hormone-like mediators (lymphokines).
Functions of lymphokines 1. Inhibition of macrophage migration: macrophage to the site of infection. Chemotactic attraction of lymphocytes, macrophages and polymorphs to the site of infection. Mitogenic activity: Stimulation lymphocytes to divide. Localizes 2. of 3. unsensitized
4.2 Normal microbial flora It denotes the population of micro-organisms that inhabit the skin and mucus membrane of healthy normal person. There are two groups of normal flora. These are:
Resident normal flora
Transient normal flora
Resident normal floras are relatively fixed microorganisms regularly inhabiting the skin and mucus membrane of the normal host.