Immunity, Mucosal - ț̢
Nonsusceptibility to the pathogenic effects of foreign microorganisms or antigenic substances as a result of antibody secretions of the mucous membranes. Mucosal epithelia in the gastrointestinal, respiratory, and reproductive tracts produce a form of IgA (IMMUNOGLOBULIN A, SECRETORY) that serves to protect these ports of entry into the body.
Immunity, Natural - ț̢
The capacity of a normal organism to remain unaffected by microorganisms and their toxins. It results from non-specific mechanisms such as naturally occurring antiviral and bactericidal substances, PHAGOCYTOSIS, and constitutional factors such as BODY TEMPERATURE, oxygen tension, and age.