DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
Lactobacillus casei Shirota bacteria, coloured scanning electron micrograph (SEM). This strain of bacteria is found in the Japanese probiotic product Yakult. Probiotic foods contain live bacteria intended to maintain or restore the balance of bacteria in the humn intestines. Magnification: x42,000 when printed 10 centimetres wide.
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