Which type of cells are found in an abscess?

An abscess is a localized collection of pus that forms due to infection, typically caused by bacteria. The key component of the inflammatory response to infection is polymorphonuclear leukocytes (PMNs), which are a type of white blood cell, also known as neutrophils. These cells are crucial in the body's immune response, as they are among the first responders to sites of infection. They work by engulfing and destroying pathogens through a process known as phagocytosis, and they release enzymes and reactive oxygen species that help to eradicate the infection.

In the context of an abscess, the accumulation of polymorphonuclear leukocytes is significant because they form the bulk of the pus that is found within the abscess cavity. This accumulation not only indicates the presence of an infection but also reflects the body's attempt to contain and eliminate the infectious agents.

Other cell types mentioned, such as mast cells, eosinophils, and epithelial cells, do not play the primary role in the formation of an abscess. Mast cells are involved in allergic reactions and the inflammatory response, eosinophils are primarily associated with responses to parasitic infections and allergic conditions, and epithelial cells are part of the tissue structure rather than the immune response to infection