In respiratory and GIT infections, which is the most affected immunoglulin -: (A) IgA, (B) IgG, (C) IgM, (D) IgD
Answer is A. Immunoglobulin A is an antibody that plays a critical role in immune function in the mucous membranes. More IgA is produced in mucosal linings than all other types of antibody combined Ref: Ananthanarayan & Parker's textbook of microbiology 9th edition pg:97-98