What is Trichinosis primarily caused by?

Trichinosis is primarily caused by the consumption of undercooked pork that is infected with the larvae of the Trichinella spiralis parasite. When pork is not cooked to the appropriate internal temperature, the larvae can survive and be ingested, leading to this parasitic infection in humans. The parasite can cause a range of symptoms, from gastrointestinal distress to muscle pain and inflammation as it migrates through the body. Proper cooking of pork eliminates the risk of infection by ensuring that the larvae are killed.

The other options relate to different types of foodborne illnesses and do not have any connection to Trichinosis. For instance, eating undercooked poultry is associated with salmonella or campylobacter infections, while raw fish can lead to parasitic infections like Anisakiasis. Raw vegetables, unless contaminated with harmful pathogens or treated improperly, are generally less associated with parasitic infections like Trichinosis.