Streptococcus anginosus group

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Streptococcus anginosus group - Wikipedia

From Wikipedia, the free encyclopedia

Streptococcus milleri

Cultures of Streptococcus anginosus on blood agar
Scientific classification
Domain:	Bacteria
Phylum:	Bacillota
Class:	Bacilli
Order:	Lactobacillales
Family:	Streptococcaceae
Genus:	Streptococcus

The Streptococcus anginosus group (SAG), also known as the anginosus group streptococci (AGS) or the milleri group streptococci (MGS), are a group of several species of streptococci with clinical similarities. The group is named after a principal member species, Streptococcus anginosus. The older name Streptococcus milleri (as well as Streptococcus milleri group, SMG) is now pseudotaxonomic, as the idea that these streptococci constituted a single species was incorrect. The anginosus group streptococci are members of the viridans streptococci group.^[1] They have been implicated as etiologic agents in a variety of serious purulent infections, but because of their heterogeneous characteristics, these organisms may be unrecognized or misidentified by clinical laboratorians.^[2] The unique characteristic of them from other pathogenic streptococci, such as S. pyogenes and S. agalactiae, is their ability to cause abscesses.^[3]^[4]

Species

Members include:^[2]

Streptococcus anginosus
Streptococcus constellatus
- S. constellatus subsp. constellatus
- S. constellatus subsp. pharyngis
Streptococcus intermedius

Nomenclature

These nonhemolytic viridans streptococci were first described by Guthof in 1956 after he isolated them from dental abscesses. He named these organisms Streptococcus milleri in honor of the microbiologist W. D. Miller.^[5]^[6]

Occurrence

The organisms were subsequently recognized as normal flora of the human oral cavity and gastrointestinal tract with the ability to cause abscesses and systemic infections.^[7]

References

^ Streptococcus+milleri+group at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
^ ^a ^b Ruoff, K L (Jan 1988). "Streptococcus anginosus ("Streptococcus milleri"): the unrecognized pathogen". Clinical Microbiology Reviews. 1 (1): 102–108. doi:10.1128/CMR.1.1.102. PMC 358032. PMID 3060239.
^ Gossling, J (Mar–Apr 1988). "Occurrence and pathogenicity of the Streptococcus milleri group". Reviews of Infectious Diseases. 10 (2): 257–85. doi:10.1093/clinids/10.2.257. PMID 3287560.
^ Rashid, R. M.; Salah, W.; Parada, J. P. (1 February 2007). "'Streptococcus milleri' aortic valve endocarditis and hepatic abscess". Journal of Medical Microbiology. 56 (2): 280–282. doi:10.1099/jmm.0.46781-0. PMID 17244814.
^ Whiley, RA; Beighton, D (January 1991). "Emended descriptions and recognition of Streptococcus constellatus, Streptococcus intermedius, and Streptococcus anginosus as distinct species". International Journal of Systematic Bacteriology. 41 (1): 1–5. doi:10.1099/00207713-41-1-1. PMID 1995029.
^ Verrall, R (November 1986). "The Streptococcus milleri group". Infection Control and Hospital Epidemiology. 7 (11): 558–60. doi:10.1017/S0195941700065334. JSTOR 30146431. PMID 3640746.
^ Mejàre, B; Edwardsson, S (November 1975). "Streptococcus milleri (Guthof); an indigenous organism of the human oral cavity". Archives of Oral Biology. 20 (11): 757–62. doi:10.1016/0003-9969(75)90048-5. PMID 1061530.

External links

Bacillota (low-G+C) Infectious diseases
Bacterial diseases: G+

Bacilli

Lactobacillales
(Cat-)

Streptococcus

optochin susceptible	S. pneumoniae Pneumococcal infection
optochin resistant	Viridans streptococci: S. mitis S. mutans S. oralis S. sanguinis S. sobrinus S. anginosus group

A	bacitracin susceptible: S. pyogenes Group A streptococcal infection Streptococcal pharyngitis Scarlet fever Erysipelas Rheumatic fever
B	bacitracin resistant, CAMP test+: S. agalactiae Group B streptococcal infection
ungrouped	Streptococcus iniae Cutaneous Streptococcus iniae infection

D
BEA+: Streptococcus bovis

Enterococcus

Bacillales
(Cat+)

Staphylococcus

Cg+	S. aureus Staphylococcal scalded skin syndrome Toxic shock syndrome MRSA
Cg-	novobiocin susceptible S. epidermidis novobiocin resistant S. saprophyticus

Bacillus

Listeria

Listeria monocytogenes
- Listeriosis

Clostridia

Clostridium (spore-forming)

motile:	Clostridium botulinum Botulism Clostridium tetani Tetanus
nonmotile:	Clostridium perfringens Gas gangrene Clostridial necrotizing enteritis

Clostridioides (spore-forming)

Clostridioides difficile [Clostridium difficile]
- Pseudomembranous colitis

Finegoldia (non-spore forming)

Finegoldia magna

Mollicutes

Mycoplasmataceae	Ureaplasma urealyticum Ureaplasma infection Mycoplasma genitalium Mycoplasma pneumoniae Mycoplasma pneumonia
Anaeroplasmatales	Erysipelothrix rhusiopathiae Erysipeloid

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