In a parasite chain, a smaller organism consumes part of a larger host and may itself be parasitized by even smaller organisms.

在寄生链中，较小的生物体消耗较大的宿主的身体部分，本身又可能被更小的生物体所寄生；

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The culprit parasite, Toxoplasma gondii, can get into the food chain via cats faeces causing contamination of soil, water and plants.

BBC: Infection risk posed by cats revealed