Light micrograph of colony of Streptococcus pyogenes,a species of gram-positive,non-motile,spherical bacterium that occur in chains. S. pyogenes is pathogenic and haemolytic (ie it has the ability to destroy red blood cells in blood agar culture - a useful factor in identifying the numerous strains that occur). Various strains of S. pyogenes are associated with numerous infections,including scarlet fever; they also produce exotoxins,potent poisons that are harmful to a limited range of tissues,and are secreted by the bacterium into the surrounding media. Mag: x400 at 6x4.5cm size,x254 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Burbidge, John |
Bildgröße: | 2515 px × 3704 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |