What is the morphology of Trichinella spiralis?
What is the morphology of Trichinella spiralis?
Morphology. Males of T. spiralis measure between 1.4 and 1.6 mm long, and are more flat anteriorly than posteriorly. The anus can be found in the terminal end, and they have a large copulatory pseudobursa on each side.
What is the infective form of Trichinella spiralis?
Trichinosis. Trichinella spiralis is a zoonotic infection acquired by ingestion of contaminated undercooked or raw pork or game meat. Infectious cysts in striated muscle tissue are digested, releasing L1 larvae which mature into adults in the small intestine. The adult forms release newborn larvae in a few weeks.
What is the pathogenesis of Trichinella spiralis?
Trichinellosis, also called trichinosis, results from roundworms (nematodes) from the genus Trichinella. It is a parasitic infection. It is caused by consuming undercooked or raw meat (usually pork). Trichinella spiralis species is the common cause of human disease by eating raw or undercooked pork.
What type of infection is trichinosis?
Trichinosis is a food-borne disease caused by a microscopic parasite called Trichinella. People can get this disease by eating raw or undercooked meat from animals infected with the parasite. Often these infected meats come from wild game, such as bear, or pork products.
What are the characteristics of Trichinella spiralis?
Trichinella spiralis is the smallest known nematode parasite of humans. The males measure about 1.4 mm to 1.6 mm in length and the females are twice the size of the males. The body of the worm is more slender at the anterior then at the posterior end.
How is Trichinella infection acquired?
People get trichinosis when they eat undercooked meat — such as pork, bear, walrus or horse — that is infected with the immature form (larvae) of the trichinella roundworm. In nature, animals are infected when they feed on other infected animals.
How does a person get infected with Trichinella spiralis?
Trichinosis infects humans when they eat undercooked infected meat, such as pork, bear or walrus, or other meat contaminated by grinders or other equipment.
Is Trichinella spiralis an helminth?
The parasitic helminth Trichinella spiralis, which poses a serious health risk to animals and humans, can be found worldwide. Recent findings indicate that a rare type of gut epithelial cell, tuft cells, can detect the helminth, triggering type 2 immune responses.
What causes trichinosis infection?
Trichinellosis, also called trichinosis, is caused by eating raw or undercooked meat of animals infected with the larvae of a species of worm called Trichinella.
What is the size of Trichinella spiralis?
Trichinella spiralis is related to other trichiurids having a slender anterior and a wider posterior end. Female worms measure 2–4 mm and males 1–1.5 mm. Infections are acquired by eating uncooked muscle containing encysted larvae from infected animals, usually pigs.
How do you get Trichinella spiralis from pork?
Trichinella spiralis is a zoonotic infection acquired by ingestion of contaminated undercooked or raw pork or game meat. Infectious cysts in striated muscle tissue are digested, releasing L1 larvae which mature into adults in the small intestine.
What is the structure of the uterus in Trichinella spiralis?
The single uterus of the female is filled with developing eggs in the posterior portion, while the anterior portion contains the fully developed juveniles. Trichinella spiralis can live the majority of its adult life in the intestines of humans.
What is the difference between male and female trichinosis spiralis?
The females of T. spiralis are about twice the size of the males, and have an anus found terminally. The vulva is located near the esophagus. The single uterus of the female is filled with developing eggs in the posterior portion, while the anterior portion contains the fully developed juveniles.
