5. Undercooked meat can cause it
While tainted pork is one of the common ways that the roundworm parasite gets into humans, it isn’t the only way. In fact, the concept that tainted meat is the culprit for trichinosis infections in humans extends to all proteins. This could include the undercooked meat taken from a horse bear, pig, or even walrus. Any animal that is infected with the roundworm parasite will hold larvae in its meat that can infect humans once the meat makes its way into the digestive system.
Animal to animal transmission occurs whenever one animal eats another — with the second animal, the prey, being an infected host. Horses and pigs don’t eat other animals when in captivity, but they can become infected when eating garbage that contains tainted meat or larvae. Cattle don’t eat meat, but some beef can become tainted if it was ground using the same machine used to process tainted pork.