MicrobeHunter.com » parasite http://www.microbehunter.com of Microscopy, Microbes and More Wed, 01 Feb 2012 21:31:48 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Trichinella spiralis – the “pork worm” http://www.microbehunter.com/2010/02/04/trichinella-spiralis-the-pork-worm/ http://www.microbehunter.com/2010/02/04/trichinella-spiralis-the-pork-worm/#comments Thu, 04 Feb 2010 11:00:33 +0000 Oliver http://www.microbehunter.com/?p=1494
Trichinella spiralis nematode parasite
Encapsuled Trichinella spiralis larva in muscle. The larva is cut diagonally.
Trichinella spiralis nematode parasite
Longitudinal cross-section.
Trichinella spiralis nematode parasite
The larva (circular patterns) in cross-section.
Trichinella spiralis is the smallest nematode parasite in humans. It causes the disease trichinosis. It is also one of the most wide spread parasites of the world. It can be contracted by eating raw or half-cooked pork or wild game animals.

Life Cycle of Trichinella spiralis

  • T. spiralis larva are encapsuled in the muscle of the host animal. The pictures on the right show different cross-sections of this stage.
  • A person who eats raw or undercooked meat will take these larva up into the body. The larvae are released by the stomach acid and pass into the intestine, where they mature and start to reproduce.
  • The offspring larvae travel in the circulatory system throughout the body and settle in the muscles, where they encyst again.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

]]> http://www.microbehunter.com/2010/02/04/trichinella-spiralis-the-pork-worm/feed/ 0 The Tick (Ixodidae) http://www.microbehunter.com/2009/11/28/the-tick-ixodidae/ http://www.microbehunter.com/2009/11/28/the-tick-ixodidae/#comments Sat, 28 Nov 2009 14:42:25 +0000 Oliver http://microscopy.okim.info/?page_id=1396

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A tick in dark field
The tick (Ixodidae) in dark field, edited and placed on white background.


Image Information: The tick was treated with alcohol and preserved in permanent mounting medium (Eukitt). Darkfield images were then taken under 40x magnification and stitched together with panorama software. The tick was cut out and placed on white background.


Background Information: Ticks are parasites that feed on blood. They are known to transmit a variety of diseases, such as Lyme disease (borreliosis) and tick-borne encephalitis.

Zoom into the image here: Virtual microscope: The Tick.

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