Abstracts - faqs.org

Abstracts

Biological sciences

Search abstracts:
Abstracts » Biological sciences

Extensive genetic diversity among clinical isolates of Streptococcus pyogenes serotype M5

Article Abstract:

Streptococcus pyogenes group A streptococci (GAS) have several virulence factors, the best known of which is the M protein. The emm gene encoding M protein is amplified by PCR with conserved primers and several emm gene sequences have been established. The genetic diversity of randomly selected clinical isolates of serotype M5, linked to a wide range of GAS diseases, was examined, and strain phylogenies were analyzed. Nucleotide sequencing of the 5' end of the gene was used to investigate polymorphism of the emm gene, and a high degree of genetic diversity in serotype M5 was observed.

Author: Stanley, John, Desai, Meeta, Tanna, Asha, Efstratiou, Androulla, George, Robert, Clewley, Jonathan
Publisher: Society for General Microbiology
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1998
Observations, Genetic polymorphisms, Microbiological research

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Streptococcus pyogenes protein F promotes invasion of HeLa cells

Article Abstract:

Research was conducted to examine the bacterial components involved in host-cell invasion by virulent Streptococcus pyogenes using transposon mutagenesis. Results indicated that less invasive mutants had decreased expression of protein F on their surface compared with the parental strain. Findings also demonstrated that protein F is an essential component of S pyogenes necessary for the invasion of cultured epithelial cells.

Author: Caparon, Michael, Hanski, Emanuel, Okada, Nobuhiko, Tatsuno, Ichiro, Sasakawa, Chihiro
Publisher: Society for General Microbiology
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1998
Research, Transposons, Bacterial proteins, Mutagenesis, HeLa cells

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Mitogenic factor (MF) is the major DNase of serotype M89 Streptococcus pyrogenes

Article Abstract:

Results show that disruption of the gene encoding the mitogenic factor MF does not affect growth or virulence but affects DNase production and activity in Streptococcal pyrogenes indicating that mf gene codes for DNase B.

Author: Sriskandan, Shiranee, Unnikrishnan, Meera, Krausz, Thomas, Cohen, Jonathan
Publisher: Society for General Microbiology
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2000
United Kingdom, Analysis, Physiological aspects, Growth, Bacteria, Gene expression, Mitogens, Myositis, Necrotizing fasciitis

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Subjects list: Genetic aspects, Streptococcus pyogenes
Similar abstracts:
  • Abstracts: Heterogeneity among 16S-23S rRNA intergenic spacers of species within the 'Streptococcus milleri group'. Phylogenetic relationships of pleurotus species according to the sequence and secondary structure of the mitochondrial small-subunit rRNA V4, V6 and V9 domains
  • Abstracts: Genetic diversity and taxonomy in soil-dwelling insects: the genus Orchesella. Aberrant spermatogenesis and the peculiar mechanism of sex determination in symphypleonan collembola
  • Abstracts: Genetic diversity through the looking glass: effect of enrichment bias. Genetic diversity and dynamics of Sinorhizobium meliloti populations nodulating different alfalfa cultivars in Italian soils
  • Abstracts: Niche-partitioning of Prochlorococcus populations in a stratified water column in the eastern North Atlantic Ocean
  • Abstracts: A double-selective tissue culture system for isolation of wild-type poliovirus from sewage applied in a long-term environmental surveillance
This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.
Some parts © 2025 Advameg, Inc.