Definition: an intermediate host in which no development of the parasite occurs, although its presence may be required as an essential link in the completion of the parasite's life cycle; the successive fish hosts that carry the plerocercoid of Diphyllobothrium latum, the broad fish tapeworm, to larger food fish eventually eaten by humans or other final hosts.
Synonym(s): transport host
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Examples: glitazone, GI cocktail, etc.