Larval forms of nematodes of the Anisakidae family (cod or herring worms) can cause disease in people who eat raw or undercooked seafood. These nematodes are widespread along the eastern and western coasts of the United States, and the larvae can be found in fresh fish sold in any grocery store. Luminal infestation causes few symptoms. Invasive anisakiasis may be acute or chronic and may involve the stomach or the small intestine.
异尖线虫科（鳕鱼或鲱鱼线虫）的幼虫形态可导致食用生的或未煮熟海鲜的人患病。这些线虫在美国东海岸和西海岸广泛分布，幼虫可在任何杂货店出售的新鲜鱼类中发现。腔内感染症状较少。侵袭性异尖线虫病可能是急性的或慢性的，可能累及胃或小肠。
