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

Controlled human infection (CHI) models can provide insights into transmission of pathogens such as Streptococcus pyogenes (Strep A). As part of the Controlled Human Infection with Penicillin for Streptococcus pyogenes (CHIPS) trial, we explored the potential for transmission among participants deliberately infected with the Strep A emm75 strain.

Emerging evidence indicates that interactions between bacteria shape the nasopharyngeal microbiome and influence respiratory health. This Review uses the systematic scoping methodology to summarise 88 studies including observational and experimental studies, identifying key interactions between bacteria that colonise the human nasopharynx. 

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.

The prevalence of impetigo and pharyngitis - which are both superficial group A streptococcus (GAS) infections that precede acute rheumatic fever - is poorly defined. Guidelines recommend the early diagnosis of both infections to prevent ARF; however, screening to enable the concurrent detection of these infections in high-risk populations has rarely been performed. 

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

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

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.

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

The skin is home to an array of bacteria, fungi and viruses, which together make up the skin microbiome. We explore how the skin microbiome can contribute to healthy skin.