Fil:Trichinella LifeCycle.gif

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Trichinella_LifeCycle.gif ‎(551 × 548 pixlar, filstorlek: 63 kbyte, MIME-typ: image/gif)

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Beskrivning

Trichinellosis [Trichinella spiralis] [T. pseudospiralis] [T. nativa] [T. nelsoni] [T. britovi]

Life cycle of Trichinella spp.

Trichinellosis is acquired by ingesting meat containing cysts (encysted larvae) of Trichinella. After exposure to gastric acid and pepsin, the larvae are released from the cysts and invade the small bowel mucosa where they develop into adult worms (female 2.2 mm in length, males 1.2 mm; life span in the small bowel: 4 weeks). After 1 week, the females release larvae that migrate to the striated muscles where they encyst. Trichinella pseudospiralis, however, does not encyst. Encystment is completed in 4 to 5 weeks and the encysted larvae may remain viable for several years. Ingestion of the encysted larvae perpetuates the cycle. Rats and rodents are primarily responsible for maintaining the endemicity of this infection. Carnivorous/omnivorous animals, such as pigs or bears, feed on infected rodents or meat from other animals. Different animal hosts are implicated in the life cycle of the different species of Trichinella. Humans are accidentally infected when eating improperly processed meat of these carnivorous animals (or eating food contaminated with such meat).

Källa

http://www.dpd.cdc.gov/dpdx/images/ParasiteImages/S-Z/Trichinellosis/Trichinella_LifeCycle.gif

Skapare

CDC

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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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	Datum/Tid	Miniatyrbild	Dimensioner	Användare	Kommentar
nuvarande	18 juli 2015 kl. 23.33		551 × 548 (63 kbyte)	CFCF	http://www.cdc.gov/dpdx/trichinellosis/index.html accessed 2015
	14 maj 2006 kl. 21.31		435 × 501 (25 kbyte)	Patho	{{Information\| \|Description=Trichinellosis [Trichinella spiralis] [T. pseudospiralis] [T. nativa] [T. nelsoni] [T. britovi] Life cycle of Trichinella spp. Trichinellosis is acquired by ingesting meat containing cysts (encysted larvae) of Trichinella