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Group A streptococci clones associated with invasive infections and pharyngitis in Portugal present differences in emm types, superantigen gene content and antimicrobial resistance

Ana Friães, Francisco R Pinto, Catarina Silva-Costa, Mario Ramirez*, José Melo-Cristino and The Portuguese Group for the Study of Streptococcal Infections

BMC Microbiology 2012, 12:280  doi:10.1186/1471-2180-12-280