Outbreaks of human infection caused by pyogenic streptococci of Lancefield groups C and G

Efstratiou, Androulla

doi:10.1099/00222615-29-3-207

Cited by 40 publications

(19 citation statements)

References 26 publications

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“…dysgalactiae: a-hemolytic or nonhemolytic large colony-forming group C streptococci streptococcal species after animal contact or are associated with the consumption of unpasteurized dairy food products. Community-acquired outbreaks [6,7] and clusters of hospital-acquired SDSE infections have been reported [8]. SDSE causes a variety of superficial, deep, toxin-mediated, or immunologically mediated diseases in humans.…”

Section: Epidemiology and Clinical Syndromesmentioning

confidence: 99%

Human Infections Due toStreptococcus dysgalactiaeSubspeciesequisimilis

2009

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Human streptococci that belong to Streptococcus dysgalactiae subspecies equisimilis (SDSE) have long been known under the name of beta-hemolytic groups C and G streptococci. Extensive taxonomic studies during the past years have distinguished most of the veterinary pathogens belonging to Lancefield groups C and G from those of human origin. After being considered nonpathogenic for many years, SDSE is now recognized as an important bacterial pathogen. The clinical spectrum of diseases caused by this species closely resembles Streptococcus pyogenes infections, including the occurrence of poststreptococcal sequelae. In accordance with these observations, many of the virulence factors present in S. pyogenes can also be found in SDSE strains. High nucleotide-sequence identities in virulence genes and the association of these genes with mobile genetic elements support the hypothesis of extensive horizontal gene-transfer events among streptococcal species of the pyogenic group. Recent epidemiological studies have shown increasing numbers of invasive SDSE infections, often among immunocompromised patients, and suggest that this species will probably gain even more clinical importance in the near future. For a better understanding of the changing epidemiology and pathogenicity of SDSE, an increased awareness of these microorganisms as human pathogens and proper identification are mandatory.

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Section: Epidemiology and Clinical Syndromesmentioning

confidence: 99%

Human Infections Due toStreptococcus dysgalactiaeSubspeciesequisimilis

2009

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“…In contrast, S. dysgalactiae subsp. equisimilis and S. anginosus were predominantly isolated from human infections (13,32), and S. intestinalis was mainly isolated from pigs (30). The two beta-hemolytic species S. canis and S. dysgalactiae subsp.…”

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confidence: 99%

Identification of Streptococcus canis Isolated from Milk of Dairy Cows with Subclinical Mastitis

2005

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Streptococcus canis was isolated from 31 milk samples from 11 cows in a dairy herd (with 49 lactating cows) affected by subclinical mastitis in north Rhine-Westphalia, Germany. Thirty-one isolates from the infected udder quarters were further characterized for their phenotypic and molecular properties. Most isolates (83.9%) produced ␣-galactosidase, and all were negative for ␤-D-glucuronidase. Amplification of the 16S rRNA gene by the PCR method and digestion with the restriction enzymes RsaI, MspI, and AvaII yielded speciesspecific patterns. Additional identification by species-specific amplification of the 16S rRNA gene, the 16S-23S rRNA gene intergenic spacer region, the CAMP factor-encoding gene cfg, and the internal fragments of the sodA gene was consistent with S. canis. Macrorestriction analysis of the chromosomal DNA by pulsed-field gel electrophoresis showed that the S. canis isolates originated from a single clone or were very closely related.

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“…In humans, GCS and GGS may cause pharyngitis and skin and soft tissue infections, although not as frequently as GAS (6,9,18).…”

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confidence: 99%

Survey of emm -Like Gene Sequences from Pharyngeal Isolates of Group C and Group G Streptococci Collected in Spain

et al. 2005

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We conducted a nationwide surveillance of the variable 5 emm-like (M-like protein gene) sequences from 214 pharyngeal group C and group G streptococci. Almost 75% of the isolates exhibited emm or emm-like sequences previously described. We identified six new 5 emm-like regions, and almost 23% of the isolates were nontypeable. Five emm-like sequences accounted for more than 50% of the isolates in group C and group G, suggesting horizontal gene transfer between strains of different species.

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Outbreaks of human infection caused by pyogenic streptococci of Lancefield groups C and G

Cited by 40 publications

References 26 publications

Human Infections Due toStreptococcus dysgalactiaeSubspeciesequisimilis

Human Infections Due toStreptococcus dysgalactiaeSubspeciesequisimilis

Identification of Streptococcus canis Isolated from Milk of Dairy Cows with Subclinical Mastitis

Survey of emm -Like Gene Sequences from Pharyngeal Isolates of Group C and Group G Streptococci Collected in Spain

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