The type that actually afflicts dogs is the flea tapeworm. However, there are sever cases of tapeworm but the later is the most common. The dog is likely to get this type of worms if it ingests an infected flea. Although it is rare, the same situation can happen to human beings. This type of worms can really be a problem to the humans. They cause a very serious and risky condition known as hydrated disease. This disease causes cysts in the vital organs and they can rupture and cause more trouble.