Astroviruses are about 30nm diameter and contain a positive-sense ssRNA. Thet exhibit a distinctive morphology in the electron microscope due to presence of pointed star shapes on the particles.
Astroviruses cause sporadic gastroenteritis in infants, children, elderly and immunocompromised people. Astroviruses are transmitted from person to person by the fecal oral route through contaminated food, water, person-to-person contact, or contaminated surfaces.
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