Failure of the thymus to develop,low circulating levels of lymphocytes,and failure of cell-mediated immunity characterize:
A)antibody-mediated hypersensitivity.
B)severe-combined immunodeficiency (SCID).
C)human immunodeficiency virus 1 (HIV-1).
D)acquired immunodeficiency syndrome (AIDS).

Question

Quizplus · Accepted Answer

The failure of the thymus to develop, low circulating levels of lymphocytes, and failure of cell-mediated immunity are indicative of severe combined immunodeficiency (SCID), which is a genetic disorder that affects the development and function of T cells and results in a severely compromised immune system. Antibody-mediated hypersensitivity involves an overreaction of the immune system to a specific antigen, while Human Immunodeficiency Virus 1 (HIV-1) is a virus that attacks and damages the immune system, leading to acquired immunodeficiency syndrome (AIDS). Although SCID can lead to AIDS if left untreated, the specific symptoms described in the question are more indicative of SCID.

Failure of the Thymus to Develop,low Circulating Levels of Lymphocytes,and