Erysipelas (/ˌɛrəˈsɪpələs/) is a relatively common bacterial infection of the superficial layer of the skin (upper dermis), extending to the superficial lymphatic vessels within the skin, characterized by a raised, well-defined, tender, bright red rash, typically on the face or legs, but which can occur anywhere on the skin. It is a form of cellulitis and is potentially serious.
Erysipelas is usually caused by the bacteria Streptococcus pyogenes, also known as group A β-hemolytic streptococci, through a break in the skin such as from scratches or an insect bite. It is more superficial than cellulitis, and is typically more raised and demarcated. The term is from Greek ἐρυσίπελας (erysípelas), meaning "red skin".
In animals, erysipelas is a disease caused by infection with the bacterium Erysipelothrix rhusiopathiae. The disease caused in animals is called Diamond Skin Disease, which occurs especially in pigs. Heart valves and skin are affected. Erysipelothrix rhusiopathiae can also infect humans, but in that case, the infection is known as erysipeloid.
Signs and symptoms
Symptoms often occur suddenly. Affected individuals may develop a fever, shivering, chills, fatigue, headaches, vomiting and be generally unwell within 48 hours of the initial infection. The redplaque enlarges rapidly and has a sharply demarcated, raised edge. It may appear swollen, feel firm, warm and tender to touch and may have a consistency similar to orange peel. Pain may be extreme.
The infection may occur on any part of the skin, including the face, arms, fingers, legs and toes; it tends to favour the extremities. The umbilical stump and sites of lymphoedema are also common sites affected.
Fat tissue and facial areas, typically around the eyes, ears, and cheeks, are most susceptible to infection. Repeated infection of the extremities can lead to chronic swelling (lymphoedema).
The infecting bacteria can enter the skin through minor trauma, human, insect or animal bites, surgical incisions, ulcers, burns and abrasions. There may be underlying eczema or athlete's foot (tinea pedis), and it can originate from streptococci bacteria in the subject's own nasal passages or ear.
The rash is due to an exotoxin, not the Streptococcus bacteria, and is found in areas where no symptoms are present; e.g., the infection may be in the nasopharynx, but the rash is found usually on the epidermis and superficial lymphatics.
Erysipelas is usually diagnosed by the clinician looking at the characteristic well-demarcated rash following a history of injury or recognition of one of the risk factors.
Erysipelas can be distinguished from cellulitis by two particular features; its raised advancing edge and its sharp borders. The redness in cellulitis is not raised and its border is relatively indistinct. Bright redness of erysipelas has been described as a third differentiating feature.
Depending on the severity, treatment involves either oral or intravenous antibiotics, using penicillins, clindamycin, or erythromycin. While illness symptoms resolve in a day or two, the skin may take weeks to return to normal.
The USA Food and Drug Administration has approved 4 antibiotics-- omadacycline (Nuzyra),oritavancin (Orbactiv), dalbavancin (Dalvance), and tedizolid (Sivextro) --for the treatment of acute bacterial skin and skin structure infections.
Because of the risk of reinfection, prophylactic antibiotics are sometimes used after resolution of the initial condition.
Recurrence of infection: Erysipelas can recur in 18–30% of cases even after antibiotic treatment. A chronic state of recurrent erysipelas infections can occur with several predisposing factors including alcoholism, diabetes, and athlete's foot. Another predisposing factor is chronic cutaneous edema, such as can in turn be caused by venous insufficiency or heart failure.
Necrotizing fasciitis, commonly known as "flesh-eating" bacterial infection, is a potentially deadly exacerbation of the infection if it spreads to deeper tissue.
There is currently no validated recent data on the worldwide incidence of erysipelas. From 2004 to 2005, UK hospitals reported 69,576 cases of cellulitis and 516 cases of erysipelas. One book stated that several studies have placed the prevalence rate between one and 250 in every 10,000 people. The development of antibiotics, as well as increased sanitation standards, has contributed to the decreased rate of incidence. Erysipelas caused systemic illness in up to 40% of cases reported by UK hospitals and 29% of people had recurrent episodes within three years. Anyone can be infected, although incidence rates are higher in infants and elderly. Several studies also reported a higher incidence rate in women. Four out of five cases occur on the legs, although historically the face was a more frequent site.
Chronic skin conditions such as psoriasis, athlete's foot, and eczema
Excising the saphenous vein
Immune deficiency or compromise, such as
Human immunodeficiency virus (HIV)
In newborns, exposure of the umbilical cord and vaccination site injury
Issues in lymph or blood circulation
Previous episode(s) of erysipelas
Toe web intertrigo
Venous insufficiency or disease
Individuals can take preventative steps to increase the chance they do not catch the disease. Properly cleaning and covering wounds is important for people battling an open wound. Effectively treating athlete's foot or eczema if they were the cause for the initial infection will decrease the chance of the infection occurring again. People with diabetes should pay attention to maintaining good foot hygiene. It is also important to follow up with doctors to make sure the disease has not come back or spread. About one-third of people who have had erysipelas will be infected again within three years. Rigorous antibiotics may be needed in the case of recurrent bacterial skin infections.
In Willa Cather's One of Ours, the main character, Claude, contracts the disease in "the queerest" way, after being dragged into wire by mules, and the next day continuing to work in the dust. The disease plays a key role in the novel, persuading him to marry Enid after she cares for him in recovery. (Book II, Chapter IV, p. 138).
In an episode of Downton Abbey, Isobel Crawley misdiagnoses her butler, Molesley, with erysipelas when he develops a rash on his hands. The Dowager Countess of Grantham correctly identifies the rash as an allergy to rue.
It was historically known as St. Anthony's fire.
^"Cellulitis". The Lecturio Medical Concept Library. Retrieved 7 July 2021.
^"Erysipelas". The Lecturio Medical Concept Library. Retrieved 21 July 2021.
^"Erysipelas". The Lecturio Medical Concept Library. Retrieved 7 July 2021.
^"Erysipelas". National Center for Biotechnology Information, U.S. National Library of Medicine. Retrieved 7 July 2021.
^Stevens, Dennis L.; Bryant, Amy E. (2016), Ferretti, Joseph J.; Stevens, Dennis L.; Fischetti, Vincent A. (eds.), "Impetigo, Erysipelas and Cellulitis", Streptococcus pyogenes: Basic Biology to Clinical Manifestations, University of Oklahoma Health Sciences Center, PMID26866211, retrieved 8 June 2020