VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY
Bag it and bin it, dog faeces sign. This pavement sign reminds dog owners to clean up after their dogs. If dogs are infected by the roundworm Toxocara canis, then their faeces will contain eggs from this parasite that can cause blindness in humans if ingested. Photographed in Norwich, UK.
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