Salmonella bacterium

Salmonella bacterium

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Credit: CDC/SCIENCE PHOTO LIBRARY

Caption: False-colour transmission electron micrograph of a single bacterium of the genus Salmonella, showing numerous flagellae - the bacterium's propulsion unit. All members of the Salmonella genus are intestinal parasites including S. typhi & S. paratyphi, responsible for typhoid and paratyphoid fevers in humans. Other species and serotypes are responsible for gastro-enteritis or food poisoning. Different types are classified according to their antigenic nature; some 1800 serotypes have been distinguished. S. typhi (the typhoid bacillus) is wholly parasitic, with man its only natural host. Epidemics spread via water/food supplies from a human source.

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Keywords: bacteria, bacterial, bacteriology, bacterium, electron micrograph, false-coloured, flagella, flagellum, food poisoning, gram-negative bacteria, micro-organisms, microbe, microbes, microbiology, salmonella sp., tem, transmission

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