Keywords: Streptococcus pyogenese Bacteria.jpg en Scanning electron micrograph of Streptococcus pyogenese bacteria yellow bound to a human neutrophil blue National Institute of Allergy and Infectious Diseases NIAID 2011-07-18 National Institutes of Health NIH National Institutes of Health NIH PD-USGov Uploaded with UploadWizard Streptococcus pyogenes |