We will add this information to our site, too. Mike Richards, DVM Roundworm picture Bob from Queensland, Australia sent us a great roundworm picture. The worm was passed by his new Border Collie X puppy, Cane. Cane was adopted from the local Shelter and is 12-14 weeks old. These two species of worms are transmitted to humans through the ingestion of roundworm eggs which contain infective larvae.
Dogs can acquire roundworm infections from their mothers while in the uterus.
Therefore, it is important to begin to deworm dogs at 2 weeks of age. To the best of my knowledge cats are not able to transfer roundworm infections to kittens in the uterus and therefore it is usually recommended that deworming begin at about 6 weeks of age in kittens as it takes about that long for the infection to reach the stage where deworming medications are effective. Dogs should be dewormed every 2 weeks until they are about 3 months old . There is some fear that roundworms may be passed by a puppy licking the owner. While the transmission rate through this avenue of infection is probably very very low it is still a good idea to observe good hygiene and wash hands and faces after playing with the puppy.