Dental Specialties in US. The American Dental Association recognizes nine dental specialties in which dentists can get additional training and practice in addition to or instead of general dentistry: 1  Dental public health-Study of dental epidemiology and social health policies.
Trichinella spiralis is a parasitic worm that causes the disease Trichinosis. A whipworm is a roundworm that infects the large intestine. Whipworms are found commonly in pork and are often called pork-worms. They are also found in rats, humans, dogs and cats.
When you are done reading this, take the Roundworms Quiz. Roundworms are a member of the nemathelminths phylum or group of animals. The hookworm, pinworm and trichinella are part of this group. They are more advanced than flatworms but less advanced than earthworms. They have thin round bodies, with none of the pieces or segments that earthworms have in their bodies. Roundworms live in salt water, fresh water and the soil. Many of them are harmful to man as they are parasites.