USDA / SCIENCE PHOTO LIBRARY USDA / SCIENCE PHOTO LIBRARY
Salmonella sp. Coloured transmission electron micrograph (TEM) of a Salmonella sp. bacterium. The cell is orange with yellow hair-like flagell- ae. Salmonellae belong to the Enterobacteriaceae family. They are Gram-negative, rod-shaped, motile bacteria that inhabit the gut. The Salmonella genus includes S. typhi & S. paratyphi, responsible for typhoid & paratyphoid fevers in humans. Other serotypes are responsible for gastroenteritis or food poisoning. Different types are classified according to their antigenic nature; around 1800 serotypes of Salmonella have been identified. Magnification: unknown.
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