Yoghurt bacteria, SEM

Yoghurt bacteria, SEM

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Caption: Yoghurt bacteria. Coloured scanning electron micrograph (SEM) of the bacteria Streptococcus thermophilus and Lactobacillus bulgaricus. S. thermophilus (orange) are spherical, Gram-positive bacteria that often form chains, as seen here. This thermophile bacterium is capable of living at temperatures of 50-65 degrees Celsius. L. bulgaricus (orange) are Gram-positive rod-shaped bacteria that grow in acid environments (including the human intestinal tract) and produce lactic acid by the fermentation of carbohydrates. Both of these bacteria are used in the manufacture of yoghurt from milk, by incubation at a high temperature. Magnification unknown.

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Keywords: acid, acidic, bacteria, bacterial, bacterial microflora, bacteriology, bacterium, biology, cell, cells, coloured, dairy products, digestion, digestive, fermentation, food, gram-positive, gut, human, intestinal, lactic acid, lactobacillus bulgaricus, micro-organism, micro-organisms, microbe, microbes, microbiology, milk, mouth, person, scanning electron micrograph, sem, stomach, streptococcus thermophilus, yoghurt

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