French term (edited): dermohypodemite nécrosante à pneumocoque

https://dermnetnz.org/topics/streptococcal-skin-infections/
Pneumococci
S pneumoniae bacteria may live in the throat and nose of healthy people. They produce a sticky substance on their outer shell which enables them to attach to the lining of the nose or throat and invade, causing infections in some patients. Most infections involve the respiratory tract or meninges but pneumococci occasionally causes cellulitis. Cellulitis due to pneumococci usually affects patients with connective tissue disease or HIV infection.


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Note added at 18 hrs (2020-07-07 06:51:03 GMT)
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https://www.msdmanuals.com/home/skin-disorders/bacterial-ski...

Necrotizing skin infections, including necrotizing cellulitis and necrotizing fasciitis, are severe forms of cellulitis characterized by death of infected skin and tissues (necrosis). The infected skin is red, warm to the touch, and sometimes swollen, and gas bubbles may form under the skin.

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Note added at 18 hrs (2020-07-07 07:02:33 GMT)
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https://academic.oup.com/cid/article-abstract/14/1/247/35433...

Cellulitis Due to Streptococcus pneumoniae: Case Report and Review
Abstract
Although Streptococcus pneumoniae remains the most common cause of community-acquired bacterial pneumonia, its involvement in skin infection is notably infrequent. A review of the literature uncovered only 13 cases of pneumococcal cellulitis in adults. Distinguishing features of skin infection by S. pneumoniae included the presence of bullae, brawny erythema, and a violaceous hue in the affected skin area. Most patients with pneumococcal cellulitis had chronic illnesses or were immunocompromised because of drug or alcohol abuse. Even with appropriate antimicrobial therapy, many patients required prolonged hospitalizations and surgery for cure. We report a case of primary pneumococcal cellulitis with secondary bacteremia in an alcoholic patient who required extensive surgical therapy and whose course was additionally complicated by acute glomerulonephritis




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Note added at 18 hrs (2020-07-07 07:03:25 GMT)
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https://www.news-medical.net/health/Streptococcus-pneumoniae...
treptococcus pneumoniae (pneumococcus) is a Gram-positive bacterium that is responsible for the majority of community-acquired pneumonia. It is a commensal organism in the human respiratory tract, meaning that it benefits from the human body, without harming it. However, infection by pneumococcus may be dangerous, causing not only pneumonia, but also bronchitis, otitis media, septicemia, and meningitis.