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Streptococcus anginosus group — Streptococcus anginosus group (S. anginosus, S. intermedius, S. constellatus)

Review by an infectious diseases specialist in progress · edited by a physician, AI-assisted writing · level of evidence computed from the source type · page as of 30 October 2026 · Methodology

Streptococcaceae · Gram-positive

Le groupe anginosus (anciennement groupe milleri) comprend S. anginosus, S. intermedius et S. constellatus — bacteria abscessogènes par excellence. Leur présence en hémoculture fait rechercher, dans la littérature, un foyer suppuratif profond (abcès cérébral, hépatique, pulmonaire, intra-abdominal). S. intermedius a un tropisme neurologique préférentiel (abcès cérébraux). S. constellatus est plus souvent associé aux infections pulmonaires/thoraciques. À distinguer des autres streptocoques : une imagerie complète en urgence est décrite, car les abcès profonds associés peuvent être méconnus.

Scope: dosing as described in the cited guidelines (French or international context, stated by the source), for adults with normal renal function unless stated on the line. No renal or hepatic, paediatric or pregnancy adjustment is provided systematically. These regimens have not been reviewed by any infectious-disease specialist to date.

Documented organ tropism

Organs where foci of Streptococcus anginosus group are described in the cited literature. The reported frequency is not an individual probability.

Organ	Tropism	Level of evidence	Sources	Spread route
Teeth / Oral cavity (abcès odontogène, cellulite cervico-faciale)	Moderate tropism	Evidence B	2	contiguous
Central nervous system	High tropism	Evidence C	2	not recorded
Liver / Bile duct (abcès hépatique)	High tropism	Evidence B	3	not recorded
Lung (empyème)	High tropism	Evidence C	1	not recorded
Colon / Alimentary system (abcès intra-abdominal)	High tropism	Evidence B	2	not recorded
Heart / Endocardium	Moderate tropism	Evidence B	1	not recorded

Spread routes recorded: 1 of 6 documented foci A focus without a route is not a focus without spread: the route is simply not recorded.

Associated syndromes

• Brain abscess

Sources

• AFSSAPS — Prescription des antibiotiques en pratique bucco-dentaire : recommandations (Lesclous P, Méd Buccale Chir Buccale) (2011) — doi:10.1051/mbcb/2011138
• Doern CD & Burnham CA — It's not easy being green: the viridans group streptococci, with a focus on pediatric clinical manifestations (J Clin Microbiol) (2010) — doi:10.1128/jcm.01563-10
• Mathisen GE & Johnson JP — Brain abscess (1997) — doi:10.1086/515541
• IDSA — Intra-abdominal Infections Guidelines (2010) — doi:10.1086/649554
• Mazuski JE et al. — The Surgical Infection Society Revised Guidelines on the Management of Intra-Abdominal Infection (Surg Infect) (2017) — doi:10.1089/sur.2016.261
• ESC Guidelines for the management of endocarditis (Delgado V et al.) (2023) — doi:10.1093/eurheartj/ehad193

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