Stray animals should be avoided. Gloves should be worn during the cleaning of aquariums to reduce the risk of infection with Mycobacterium marinum. Contact with exotic pets, such as non-human primates, should be avoided. Ascarid Infections Ascarids are worms. Eggs of T. canis are passed in the feces and larva develop to the infective stage within the egg.
Eggs are extremely resistant to adverse conditions.
Infection can occur from contact with dog feces, dirt, earthworms, mice, etc. Expulsion of the worm in infected cats can be through the feces or vomitus. Rodent ingestion is a common mode of transmission to the cat. Transmission to humans is usually by ingestion of infective eggs from soil contaminated with dog or cat feces or by directly handling of the feces. Dogs should be kept away from feces found on the street.