Question

Choose the incorrect statements

• A. Poliovirus is an RNA virus that spreads via the fecal route and mainly destroys motor neurons in the spinal cord
• B. Upon subsequent exposure to antigen anamnesric response seen in man is dominated by Poliovirus
• C. Innate immunity is pathogen specific and characterised by memory
• D. Primary and secondary immune responses are carried out with the 0 help of special type of lymphocytes which in turn meditate OIL and humoral immune response

Answer 1

The correct option is C Innate immunity is pathogen specific and characterised by memory

Poliovirus is acquired orally (usually from hands contaminated with the stool of an infected person) and replicates first in the intestinal tract but then travels in the blood to the spinal cord and CNS causing muscle weakness and paralysis. Parenteral inactivated poliovirus vaccine (IPV) chiefly induces the formation of serum antibody. Innate immunity is seen in response to a pathogen or foreign body entering the body of the organism and is not characterized by memory. Memory response is a characteristic of adaptive immunity. Humoral immunity refers to mechanisms of the adaptive immune defenses that are mediated by antibodies secreted by B lymphocytes. Primary and secondary immune responses, in turn, are carried out by B and T lymphocytes. So, the correct option is 'Innate immunity is pathogen-specific and characterized by memory'.