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.
Unsegmented worms are generally parasitic rather than the free-living members of their phylum. Parasitic round worms include hookworms, trichinosis-causing worms, filarial worms, and eye worms. -Hookworms are serious human intestinal parasites that are found in southern United States and cause weakness and poor growth to its host. -Trichinosis is a disease caused by the roundworm Trichinella.