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Recombinational exchange of M-fibril and T-pilus genes generates extensive cell surface diversity in the global group A Streptococcus population

Among genes present in all group A streptococci (GAS), those encoding M-fibril and T-pilus proteins display the highest levels of sequence diversity, giving rise to the two primary serological typing schemes historically used to define strain. A new genotyping scheme for the pilin adhesin and backbone genes is developed and, when combined with emm typing, provides an account of the global GAS strain population.

Macrophage infectivity potentiator protein, a peptidyl prolyl cis-trans isomerase, essential for Coxiella burnetii growth and pathogenesis

Coxiella burnetii is a Gram-negative intracellular pathogen that causes the debilitating disease Q fever, which affects both animals and humans. The only available human vaccine, Q-Vax, is effective but has a high risk of severe adverse reactions, limiting its use as a countermeasure to contain outbreaks. Therefore, it is essential to identify new drug targets to treat this infection.

Host-dependent resistance of Group A Streptococcus to sulfamethoxazole mediated by a horizontally-acquired reduced folate transporter

Described antimicrobial resistance mechanisms enable bacteria to avoid the direct effects of antibiotics and can be monitored by in vitro susceptibility testing and genetic methods. Here we describe a mechanism of sulfamethoxazole resistance that requires a host metabolite for activity.

Standardization of epidemiological surveillance of group A Streptococcal cellulitis

Cellulitis is an acute bacterial infection of the dermis and subcutaneous tissue usually found complicating a wound, ulcer, or dermatosis. This article provides guidelines for the surveillance of cellulitis.

Streptolysins are the primary inflammasome activators in macrophages during Streptococcus pyogenes infection

Group A Streptococcus (GAS) is a Gram-positive bacterial pathogen that causes an array of infectious diseases in humans. Accumulating clinical evidence suggests that proinflammatory interleukin (IL)-1beta signaling plays an important role in GAS disease progression.

Genetic Manipulation of Group A Streptococcus-Gene Deletion by Allelic Replacement

An optimized, rapid method for creating markerless isogenic mutations that combines Gibson assembly cloning with a new temperature-sensitive plasmid, pLZts

A diagnostic test for acute rheumatic fever (pilot study)

Currently there are no diagnostic tests for ARF, and no treatments targeting immune responses to improve disease outcomes.

Acute Rheumatic Fever Diagnosis Collaborative Network (ARC)

ARC is a global network of collaborators committed to reducing the burden of RHD in our lifetime.

Defining Group A Streptococcus interaction with the tonsil epithelium to inform vaccine development

A vaccine that prevents the initial attachment of Strep A to the tonsils would reduce the incidence of Strep throat and severe diseases that result.

Improved diagnosis, treatment and prevention of recurrent tonsillitis

Strep A causes over 775 million infections each year world-wide, including over 615 million cases of tonsil infection (Strep throat).