CICLO DE VIDA DE TRICHURIS TRICHIURA PDF

The unembryonated eggs are passed with the stool. In the soil, the eggs develop into a 2-cell stage , an advanced cleavage stage , and then they embryonate ; eggs become infective in 15 to 30 days. After ingestion soil-contaminated hands or food , the eggs hatch in the small intestine, and release larvae that mature and establish themselves as adults in the colon. The adult worms approximately 4 cm in length live in the cecum and ascending colon. The adult worms are fixed in that location, with the anterior portions threaded into the mucosa.

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The unembryonated eggs are passed with the stool. In the soil, the eggs develop into a 2-cell stage , an advanced cleavage stage , and then they embryonate ; eggs become infective in 15 to 30 days. After ingestion soil-contaminated hands or food , the eggs hatch in the small intestine, and release larvae that mature and establish themselves as adults in the colon.

The adult worms approximately 4 cm in length live in the cecum and ascending colon. The adult worms are fixed in that location, with the anterior portions threaded into the mucosa. The females begin to oviposit 60 to 70 days after infection. Female worms in the cecum shed between 3, and 20, eggs per day.

The life span of the adults is about 1 year. Contact Us. Skip directly to site content Skip directly to page options Skip directly to A-Z link. Parasites - Trichuriasis also known as Whipworm Infection. Section Navigation. Biology Minus Related Pages. Causal Agent: The nematode roundworm Trichuris trichiura , also called the human whipworm. Life Cycle: The unembryonated eggs are passed with the stool.

Life cycle image and information courtesy of DPDx. To receive email updates about this page, enter your email address: Email Address. What's this? Links with this icon indicate that you are leaving the CDC website. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.

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