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Group A Streptococci are a species of gram-positive bacteria responsible for causing a number of pyogenic (pus-producing) infections including impetigo, scarlet fever and pneumonia. Further fatal complications arising from infection include the development of meningitis and sepsis.
David Goulding, Wellcome Trust Sanger Institute
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Salmonella Typhimurium infection of a human epithelial cell
David Goulding, Wellcome Trust Sanger Institute