Mr.Johnson has an immunodeficiency disease called X-linked agammaglobulinemia owing to a genetic defect in a gene called Bruton's tyrosine kinase (Btk),which is required for B cell development.He lacks B cells and is therefore unable to produce antibodies.He receives regular injections of gammaglobulin to ensure he has protective immunity against microbial diseases.This is an example of

Question

Quizplus · Accepted Answer

Passive immunity involves the transfer of pre-formed antibodies from one individual to another. In this case, Mr. Johnson is receiving gammaglobulin, which contains antibodies against various microorganisms, to protect him from infections since he is unable to produce his own antibodies. This is different from active immunity, in which an individual's immune system produces their own antibodies after exposure to an antigen. Attenuated immunity involves the use of weakened live microorganisms, subunit vaccination involves the use of specific components of a microorganism, and inactivated immunity involves the use of dead microorganisms. None of these apply to Mr. Johnson's condition.

MrJohnson Has an Immunodeficiency Disease Called X-Linked Agammaglobulinemia Owing to a Genetic