immunity

 

may be natural acquired or IMMUNITY

 

A. Natural immunity is present at birth and provides protection against disease and aids

in recovery from disease. However, it also provides the basis for organ rejection after

transplantation. Factors involved in natural immunity include:

1-Physical barriers such as skin and mucous membranes

. Genetically controlled 2-susceptibility and nonsusceptibility to certain diseases

., 3. Inflammation which involves a vascular response and a cellular response by phagocytic

cells

. Acute-phase plasma protein such as C-reactive protein, haptoglobin, and fibrinogen

which are produced in response to injury and aid in wound healing

 B. Acquired or specific immunity results when immunologic memory and antibody specific

to a foreign antigen develop in response to the antigen. Acquired immunity may be active

(through immunization or disease) or passive (through transplacental transfer). This type

of immunity involves both cell-mediated and humoral immune responses

 

 

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