Hookworm. Coloured scanning electron micrograph (SEM) of the head of the parasitic nematode worm Ancylostoma ceylanicum. Hookworms live in the intestines of their host. The head contains several tooth-like structures which it uses to cling to the intestinal wall. They are responsible for widespread morbidity and mortality in animals primarily due to their blood-sucking activities in the intestine. Larvae enter the bloodstream by ingestion or by skin penetration. Magnification: x200 when printed
Dracunculiasis, also called guinea worm disease is produced by the development of Dracunculus parasite in the tissue of mammals. It has been highly reported in animals in Africa and Asia. The worm enters a host by ingesting stagnant water contaminated with guinea worms. The disease is painful, burning sensation, and a blister is formed usually on the lower limb
Helminths are worm-like organisms that live and feed off living hosts, receiving nourishment and protection while disrupting their hosts' nutrient absorption, causing weakness and disease. Those that live inside the digestive tract are called intestinal parasites. They can live inside humans as well as other animals.
Large intestine. Coloured scanning electron micrograph (SEM) of the mucosa (lining) of the colon, showing numerous tubular glands (creases) and goblet cells (small dots). Goblet cells secrete mucus to lubricate food and prevent self-digestion. Magnification: x135 when printed 10 centimetres wide.