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Raccoon Roundworms (Baylisascaris)

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Raccoon roundworms (Baylisascaris procyonis) are parasites that live in the intestines of raccoons. These roundworms lay thousands of tiny eggs that are spread in the environment wherever raccoons defecate (poop). If a person touches raccoon droppings, or touches soil or surfaces where raccoon droppings have been, they can get raccoon roundworm eggs on their hands. These eggs can be transferred from contaminated hands to a personā€™s mouth, and if they are accidentally swallowed, can make a person very sick. Infection with raccoon roundworms is rare, but it can lead to severe damage to the brain and spinal cord, eyes, and other organs. Toddlers and young children are most likely to become infected because children often put their hands in their mouths and are more likely to accidentally eat dirt. 

Raccoon roundworm infections are very rare in California ā€“ there have been fewer than 10 human cases since 1993. Raccoon roundworm infections can be prevented by removing any raccoon droppings that are found around the home or surrounding property and by removing trash or other food sources that may attract raccoons. Always wear protective clothing and disposable gloves when cleaning up raccoon droppings (PDF). Even after raccoon droppings are cleaned up, roundworm eggs that are too small to see can still be present in the area where the droppings were found. Roundworm eggs can survive for several months to years in the environment. Parents should always keep an eye on children to keep them from putting dirt or other objects in their mouths while outside and to be sure that children always wash their hands after playing outside. 

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