Trichinella in Muscle (image) Washington University School of Medicine Caption Trichinosis is caused by eating raw or undercooked pork or carnivorous wild game animals, such as bear and walrus, infected with the parasitic worm, Trichinella spiralis. While the disease is rarely deadly, some patients live for months or years with chronic muscle pain and fatigue until the worms eventually die. Credit Photo by Jonathan Eisenback, Mactode Publications Usage Restrictions Proper credit must be given and the image can only be used in conjunction with articles about the Trichinella genome in Nature Genetics. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.