What contagious skin disease is transmitted by the itch mite?

The correct answer is scabies, which is a contagious skin disease caused by the infestation of the Sarcoptes scabiei mite, commonly known as the itch mite. This condition is characterized by intense itching and a rash, as the mites burrow into the skin to lay their eggs, resulting in an inflammatory response in the host's skin. The primary method of transmission is through prolonged skin-to-skin contact with an infected person, although it can also spread via shared clothing or bedding.

In contrast, psoriasis is a chronic autoimmune condition that leads to the rapid proliferation of skin cells, resulting in thick, scaly patches, but it is not contagious. Eczema, also known as atopic dermatitis, is an inflammatory skin condition that can lead to itchy and inflamed skin, but it is primarily related to genetic and environmental factors, rather than being caused by a contagion. Ringworm, while also contagious, is a fungal infection and is not caused by a mite. The term "ringworm" may be misleading, as it does not involve any actual worms. Each of these conditions has distinct causes and transmission methods, which is why scabies is the only one associated with the itch mite.