1. Trichiniasis is caused by eating raw or undercooked pork that is infected with the parasitic worm Trichinella spiralis.
(译文:肉虫病是因为食用了被寄生虫猪圆线虫感染的生或不煮熟的猪肉引起的。)
2. The symptoms of trichiniasis usually start to appear about 1-2 days after eating contaminated meat.
(译文:肉虫病的症状通常在食用了受污染的肉后的1-2天开始出现。)