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Human antibody-mediated diseases (type II hypersensitivity): Rheumatic fever

A) Destruction of platelets
B) Joint inflammation
C) Damage to the thyroid gland
D) Impaired neuromuscular transmission

1 Answer

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Final answer:

Rheumatic fever is a type II hypersensitivity disorder that can lead to joint inflammation and severe heart damage due to an immune system attack on tissues mistaken for Streptococcus pyogenes.

Step-by-step explanation:

Human antibody-mediated diseases, or type II hypersensitivities, involve the immune system where antibodies directly cause damage to the body's own tissues. As an example, rheumatic fever is a type II hypersensitivity disorder characterized by the immune system's response to an infection with Streptococcus pyogenes, which may lead to the generation of antibodies that mistakenly react with heart muscle and other tissues such as joints and nervous tissue, believing them to have a similar structure to the bacteria. This immune reaction can cause joint inflammation, among other symptoms. While other type II hypersensitivities can involve destruction of platelets, damage to the thyroid gland, or impaired neuromuscular transmission, the specific disease process in rheumatic fever primarily leads to joint pain and the potential for severe heart damage due to inflammation.

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