During the 1940s, studies of autopsied muscle samples showed that 16% of persons in the United States had trichinellosis; 300-400 cases were diagnosed every year, and 10-20 deaths occurred. Since then, the rate of infection has declined markedly; from 1991 through 1996, three deaths and an average of 38 cases per year were reported.
http://jama.ama-assn.org/cgi/content/full/282/20/1909

Trichinella // Roundworm
Scientific classification: Roundworms make up the phylum Nematoda. Threadworms belong to the genus Ascaris. The common worm of puppies is classified as Toxocara canis. Eelworms belong to the genus Heterodera, the forms that produce earcockle of wheat belong to the genus Tylenchus, and the trichina worm belongs to the genus Trichinella. The human whipworm is classified as Trichuris trichiura.
(Microsoft Encarta 2008. 1993-2007 Microsoft Corporation)

Trichinosis:
Trichinosis, common name applied to a disease of rats, swine, bears, cats, dogs, and humans, caused by infection with the larvae of a parasitic nematode worm (see Roundworm), the trichina worm, Trichinella spiralis (see Parasite). The minute trichina worm is almost worldwide in distribution.
(Microsoft Encarta 2008. 1993-2007 Microsoft Corporation)

mild viral disease of hogs: a mild viral disease in hogs that causes lesions on the feet and in the mouth.
(Microsoft Encarta Dic)

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