File:Anisakid lifecycle.jpg
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Anisakid_lifecycle.jpg (435 × 532 pixels, file size: 55 KB, MIME type: image/jpeg)
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DescriptionAnisakid lifecycle.jpg |
English: Adult stages of Anisakis simplex or Pseudoterranova decipiens reside in the stomach of marine mammals, where they are embedded in the mucosa, in clusters. Unembryonated eggs produced by adult females are passed in the feces of marine mammals The number 1. The eggs become embryonated in water, and first-stage larvae are formed in the eggs. The larvae molt, becoming second-stage larvae The number 2a, and after the larvae hatch from the eggs, they become free-swimming The number 2b. Larvae released from the eggs are ingested by crustaceans The number 3. The ingested larvae develop into third-stage larvae that are infective to fish and squid The number 4. The larvae migrate from the intestine to the tissues in the peritoneal cavity and grow up to 3 cm in length. Upon the host's death, larvae migrate to the muscle tissues, and through predation, the larvae are transferred from fish to fish. Fish and squid maintain third-stage larvae that are infective to humans and marine mammals The number 5. When fish or squid containing third-stage larvae are ingested by marine mammals, the larvae molt twice and develop into adult worms. The adult females produce eggs that are shed by marine mammals The number 6. Humans become infected by eating raw or undercooked infected marine fish The number 7. After ingestion, the anisakid larvae penetrate the gastric and intestinal mucosa, causing the symptoms of anisakiasis. |
Date | |
Source | https://www.cdc.gov/parasites/images/anisakiasis/anisakis_lifecycle.gif |
Author | CDC |
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Public domainPublic domainfalsefalse |
This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:52, 18 April 2017 | 435 × 532 (55 KB) | Nn222eg (talk | contribs) | User created page with UploadWizard |
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8 May 2016
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18cfe604be7b353f61b85f86ca0976544bcc4f76
56,783 byte
532 pixel
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