A carbuncle is a cluster of boils caused by bacterial infection, most commonly with Staphylococcus aureus or Streptococcus pyogenes. The presence of a carbuncle is a sign that the immune system is active and fighting the infection. The infection is contagious and may spread to other areas of the body, or other people; those living in the same residence may develop carbuncles at the same time. In the early 21st century, infection involving methicillin-resistant Staphylococcus aureus (MRSA) has become more common.
Signs and symptoms
A carbuncle is a cluster of several boils, which is typically filled with purulent exudate (dead neutrophils, phagocytized bacteria, and other cellular components). Fluid may drain freely from the carbuncle, or intervention involving an incision and drainage procedure may be needed. As the impending infection develops, itching may occur. There may be localized erythema or skin irritation, and the area may be painful when touched. Sometimes more severe symptoms may occur, such as fatigue, fever, chills, and general malaise as the body fights the infection. They are also more likely to occur in middle-aged men, people who have been in contact with someone with boils or a carbuncle, people with some skin conditions like eczema, those who take medication like steroids and people with obesity or malnutrition.
Metaphor: the "monstrous carbuncle"
In 1984, Charles III, then Prince of Wales, described the proposed Sainsbury Wing extension to the National Gallery in London as a "monstrous carbuncle on the face of a much-loved and elegant friend", a term he has used since to describe other pieces of architecture.
References
ca:Àntrax
pl:Czyrak