![]() They are segmented and white or pale yellow in colour. Tapeworms are flat and could be up to 6 m long. Human contact with contaminated soil, such as working barefoot in fields, may result in these larvae penetrating through the skin and causing infection. The eggs are passed out with stool and hatch into larvae in soil. They inhabit the human intestine and attach to the intestinal wall, resulting in blood loss and causing the host to become anaemic. Hookworms are about 1 cm long, round and curved. Children are at higher risk of acquiring the infection. ![]() If the patient does not wash hands thoroughly before preparing food, ingestion of these contaminated foods by other persons could result in infection. A patient's fingers may be contaminated during scratching. They inhabit the human large intestine and migrate to the anus at night to lay eggs. Pinworms (also called threadworms) are about 1 cm in length and whitish in colour, which resemble short pieces of threads. Hands with contaminated soil can also be the transmission media. Infections are acquired through ingestion of food contaminated with their eggs. They live in the human small intestine and their eggs are passed out with stool. They have pointed ends and are light brown or pink in colour. Roundworms ( Ascaris species) are round and long, and the length can reach 20 cm. Common ones include roundworms, pinworms, hookworms, tapeworms and liver flukes. ![]() There are many intestinal parasites affecting humans. Causative agents and mode of transmission
0 Comments
Leave a Reply. |