Trichinellosis is primarily caused by infection from what type of food?

Trichinellosis is caused by a parasitic infection resulting from the ingestion of larvae of the Trichinella species, which are most commonly found in the muscle tissue of animals. The primary source of this infection comes from improperly processed meat, particularly from carnivorous animals such as pigs, wild boars, and bears. If the meat is not cooked to the appropriate internal temperature or not processed correctly, it can harbor these larvae, leading to infection when consumed by humans.

Processed meats might seem like a source of concern, but if they are properly prepared and cooked, they should not lead to trichinellosis. Shellfish and raw fruits and vegetables are not associated with this particular parasitic infection, as Trichinella is specific to certain meats. Therefore, the choice that emphasizes improperly processed meat of carnivorous animals is the most accurate in identifying the main source of trichinellosis outbreaks.