eiter

Eiter, or pus, is a thick, opaque exudate that accumulates at sites of infection. It is typically yellow to green in color and may have a characteristic foul odor. Pus forms as part of the inflammatory response to bacterial invasion, when neutrophils migrate to the site, ingest pathogens, and die, leaving behind cellular debris, bacteria, and proteins. The result is a purulent collection that can be found in wounds, dental infections, abscesses, or inflamed tissues.

Purulent material can vary in appearance depending on the organisms involved and the infection stage. Abscesses are localized pockets of pus surrounded by tissue that has become inflamed and often encapsulated. Pus may drain spontaneously or require medical or surgical drainage to promote healing.

Clinical significance and diagnosis: The presence of purulent drainage is a sign of bacterial infection. Evaluation is usually clinical, with microbiology or imaging used when the infection is deep, recurrent, or poorly responding to treatment. Treatment aims to control the infection and may include cleaning or debridement of the wound, drainage of abscesses, and antibiotics when indicated. Supportive care such as pain relief and hydration is often important.

Prevention: Effective wound care, prompt treatment of injuries, and appropriate dental and medical management help reduce the risk of purulent infections. Proper antibiotic use is important to prevent resistance and ensure effective treatment when needed.