Licensed Veterinary Technician. Yes, roundworms from dogs (and cats) can be contracted by humans. This occurs from coming into contact with fecal material, dirt or even in-animate objects that have been in contact with dirt or fecal material that is contaminated and then putting your hands to your mouth. Prevention and Cure of Roundworms in Dogs Roundworms in dogs are transmitted through the ingestion of fecal matter that is infected with the parasite. 2  This can happen a number of ways including your dog eating cat fe….