Polio viruses (type 1). Coloured transmission electron micrograph (TEM) of clusters of polio viruses,the cause of poliomyelitis (infantile paralysis). There are three serotypes of the polio virus,and this is type 1 which causes most epidemics. Although rounded in shape (light blue) each virus has a cubic symmetry. They are picornaviruses. RNA genetic material occurs in the core of each virus,surrounded by a protein coat (yellow). Infection occurs through the mouth. Usually only a mild illness results; but in more serious cases the virus may attack the nervous system causing paralysis. Polio vaccines are available. Magnification: unknown | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / CDC |
Bildgröße: | 2396 px × 1614 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |