Faecal bacteria, SEM

Bildnummer 14181559
Faecal bacteria, SEM
Faecal bacteria. Scanning electron micrograph (SEM) of bacteria cultured from a sample of human faeces. At least 50 per cent of human faeces is made up of bacteria shed from the gut. Many of these bacteria are a normal part of the flora found in the intestines and are beneficial to digestion. However, some are pathogenic, such as Salmonella enterica and certain strains of Escherichia coli, which can cause foodborne illnesses. Magnification: x1500 when printed 10 centimetres wide.
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Credit: Science Photo Library / Gschmeissner, Steve
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