Final answer:
Cellulitis is the condition that results from an infection in the dermis and subcutaneous tissue. It is characterized by a reddened and painful skin area, caused by pathogens like S. pyogenes entering through a wound. Lymphadenitis, not cellulitis, causes the formation of a bubo.
Step-by-step explanation:
The condition that usually results from an infection of the dermis and subcutaneous tissue arising after an injury or infection is cellulitis. This occurs when infectious microbes such as S. pyogenes enter the dermis through a cut or abrasion, causing a reddened and painful area of the skin that is warm to the touch. Other conditions such as cystitis and pyelonephritis affect the urinary system, not the skin, and cholecystitis is an inflammation of the gallbladder.
In the context of the conditions that result in the formation of a bubo, lymphadenitis is the correct answer. Lymphadenitis refers to inflammation of the lymph nodes, which can result in a bubo, a swollen and painful node under the skin. On the other hand, lymphangitis is the inflammation of lymph vessels, while ischemia refers to insufficient blood supply to tissues, and vasculitis is the inflammation of blood vessels.