MOREDUN ANIMAL HEALTH LTD / SCIENCE PHOTO LIBRARY MOREDUN ANIMAL HEALTH LTD / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph of a group of astroviruses. The astrovirus is known to cause diarrhoea and vomiting in humans, especially children, and in sheep, cattle and deer. It is a small virus, about 28 nanometres in diameter. Magnification: x80,000 at 6x4.5cm size.
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