一般指人以外的终末宿主。推广：若人并非某虫的终末寄主，或重点关注的宿主并非人时，则指非重点关注的终末宿主。例如当我们重点关注人时，称牛、羊等为日本血吸虫的保虫寄主。若某虫只寄生在食草动物，且我们重点关注家畜时，可将野生食草动物称为该虫的保虫宿主。
根除程序的目标是储存宿主，目的是根除病原。
Eradication programs are aimed at the reservoir of infection for the purpose of completely removing the agent.
但是，对这种储存宿主的确切流行病学作用尚无充分了解。
However the precise epidemiological role of this reservoir is not yet well known.
野生水鸟是所有甲型流感病毒的自然储存宿主，通常这些病毒对它们不具有致病性。
Wild waterfowl are the natural reservoir of all influenza a viruses, and these viruses are usually nonpathogenic in these birds.
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