Jan 06, 2011 · Eating undercooked meat from infected animals is the main cause of tapeworm infection in people. and an adult stage at which the worm can .
Fleas can carry the tapeworm’s larvae or babies. If your dog swallows it -- maybe while grooming himself -- an adult tapeworm can grow inside your dog's intestines. Tapeworms are flat, white worms that are made up of tiny segments. Each part is about the size of a grain of rice.
The adult tapeworm is made up of many small segments, called proglottids, each about the size of a grain of rice. Adult tapeworms may measure 4-28 inches in length. As the tapeworm matures inside the intestine, these segments (proglottids) break off and pass into the stool.
A tapeworm infection is usually diagnosed by finding eggs or tapeworm segments in the stool. Your doctor may ask you to bring in a sample so a lab can look for eggs, larvae, or tapeworm segments.