نتایج جستجو برای: streptococcus pyogenes

تعداد نتایج: 41893  

Journal: :Infection and immunity 1974
R P Ellen R J Gibbons

Virulent M protein-containing strains of Streptococcus pyogenes were found to adhere well to human pharyngeal cells in vitro. In contrast, an avirulent M - strain and an enteropathogenic Escherichia coli strain adhered feebly. When various rat tissues were exposed to mixtures of a virulent S. pyogenes strain and an enteropathogenic E. coli strain, the relative proportions of the two pathogenic ...

2017
Yumi Inagaki Masanobu Abe Ryoko Inaki Liang Zong Hideyuki Suenaga Takahiro Abe Kazuto Hoshi

BACKGROUND Infections in the oral and maxillofacial region can sometimes extend beyond the oral cavity, with serious consequences. Most oral infections are odontogenic, occurring through the root apex of the tooth or the periodontal pocket. It thus makes sense that edentulous patients have a much lower risk of oral bacterial infection. For this reason, while there are many reports on systemic i...

Journal: :Journal of Bacteriology 1956

Journal: :Antimicrobial agents and chemotherapy 2004
C Betriu E Culebras I Rodríguez-Avial M Gómez B A Sánchez J J Picazo

The activity of tigecycline was tested against erythromycin-resistant streptococci (107 Streptococcus pyogenes and 98 Streptococcus agalactiae strains). The presence of erythromycin and tetracycline resistance genes was determined by PCR. Among S. pyogenes strains the most prevalent gene was mef(A) (91.6%). The erm(B) gene was the most prevalent (65.3%) among S. agalactiae strains. Tigecycline ...

Journal: :Revista da Sociedade Brasileira de Medicina Tropical 2014
Lais Martins Moreira Anjos Mariana Barros Marcondes Mariana Ferreira Lima Alessandro Lia Mondelli Marina Politi Okoshi

Acute pharyngitis/tonsillitis, which is characterized by inflammation of the posterior pharynx and tonsils, is a common disease. Several viruses and bacteria can cause acute pharyngitis; however, Streptococcus pyogenes (also known as Lancefield group A β-hemolytic streptococci) is the only agent that requires an etiologic diagnosis and specific treatment. S. pyogenes is of major clinical import...

2016
Andrea L. Herrera Victor C. Huber Michael S. Chaussee

Viral infections of the upper respiratory tract are associated with a variety of invasive diseases caused by Streptococcus pyogenes, the group A streptococcus, including pneumonia, necrotizing fasciitis, toxic shock syndrome, and bacteremia. While these polymicrobial infections, or superinfections, are complex, progress has been made in understanding the molecular basis of disease. Areas of inv...

Journal: :Infection and immunity 2004
Eric R Lafontaine David Wall Serena L Vanlerberg Haig Donabedian Darren D Sledjeski

The pathogens Streptococcus pyogenes and Moraxella catarrhalis colonize overlapping regions of the human nasopharynx. We have found that M. catarrhalis can dramatically increase S. pyogenes adherence to human epithelial cells and that species-specific coaggregation of these bacteria correlates with this enhanced adherence.

Journal: :Journal of bacteriology 2007
Matthew T G Holden Annabel Scott Inna Cherevach Tracey Chillingworth Carol Churcher Ann Cronin Linda Dowd Theresa Feltwell Nancy Hamlin Simon Holroyd Kay Jagels Sharon Moule Karen Mungall Michael A Quail Claire Price Ester Rabbinowitsch Sarah Sharp Jason Skelton Sally Whitehead Bart G Barrell Michael Kehoe Julian Parkhill

Comparisons of the 1.84-Mb genome of serotype M5 Streptococcus pyogenes strain Manfredo with previously sequenced genomes emphasized the role of prophages in diversification of S. pyogenes and the close relationship between strain Manfredo and MGAS8232, another acute rheumatic fever-associated strain.

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