Trichinella Life Cycle at Life

Trichinella Life Cycle. It is a unique nematode as revealed by its multicellularity with complicated antigenicity and a life cycle occurring in a single host with different developmental stages of intestinal infective larvae, adult worm, newborn larvae, and muscle larvae. The development and colonization of trichinella spiralis occurs during four larval and one adult stages.

Morphology, life cycle and pathogenicity and prophylaxis of trichinella 8 figure 9: The life cycle of a trichinella occurs in the body of one host (animal or human), and the worm does not need to go outside. Small larval forms are encapsulated inside a small cystic structure within the host.

Trichurids

11 life cycle male dies after fertilizing the female but the fertilized female start releasing motile larva by 6th day of infection ↓ larva continue to discharge during the lifespan (4 week to 4 months) ↓ larva enter intestinal lymphatics or mesenteric venules and are transported in caiculation to various parts. In the enteral phase, muscle tissues are digested in the stomach, and larvae are released Trichinella spiralis is the species most adapted to domestic and wild swine but can also include synanthropic rats in its life cycle. Completes its entire life cycle in a single host (figure 1).