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the claim

Many parasites infect multiple hosts to complete complex life cycles and facilitate transmission

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that many parasites infect multiple hosts to complete complex life cycles and facilitate transmission?

Yes. Numerous parasitological and ecological studies confirm that many parasite species utilize multiple sequential host species to successfully complete complex life cycles and facilitate transmission.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The analysis

The retrieved literature thoroughly supports the premise that many parasites rely on complex life cycles involving multiple host species (such as intermediate, paratenic, and definitive hosts) to complete their development and ensure transmission. Papers [2], [4], [6], [8], and [11] all explicitly discuss this phenomenon without any contradictory evidence.

Evidence for · 5
Parasitism: Life Cycle and Host Defences against Parasites
2012
States that many parasites have indirect, complex life cycles involving intermediate hosts before transmission to the definitive host.
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Phillips, R. S. (2012). Parasitism: Life Cycle and Host Defences against Parasites. doi.org. https://doi.org/10.1002/9780470015902.a0003809.pub2

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More for · 4
Manipulation of host-resource dynamics impacts transmission of trophic parasites.
2014
Discusses complex life cycle parasites that rely on predator-prey interactions and intermediate hosts for transmission.
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Luong, L. T., Grear, D. A., & Hudson, P. J. (2014). Manipulation of host-resource dynamics impacts transmission of trophic parasites.. doi.org. https://doi.org/10.1016/j.ijpara.2014.05.004

Evolution of complex life cycles in trophically transmitted helminths. I. Host incorporation and trophic ascent.
2015
Examines how helminths evolve complex multi-host life cycles to facilitate transmission to definitive hosts.
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Parker, G. A., Ball, M. A., & Chubb, J. C. (2015). Evolution of complex life cycles in trophically transmitted helminths. I. Host incorporation and trophic ascent.. doi.org. https://doi.org/10.1111/jeb.12575

The evolutionary ecology of complex lifecycle parasites: linking phenomena with mechanisms.
2015
Notes that complex life cycle parasites sequentially infect multiple hosts over their lifespan to complete their life cycle and alter transmission.
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Auld, S. K. J. R. & Tinsley, M. C. (2015). The evolutionary ecology of complex lifecycle parasites: linking phenomena with mechanisms.. doi.org. https://doi.org/10.1038/hdy.2014.84

Comparative biology of parasitic nematodes in the genus Angiostrongylus and related genera.
2023
Reviews how diverse parasite species utilize intermediate, paratenic, and definitive hosts to complete complex life cycles and transmission processes.
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Cowie, R. H., Malik, R., & Morgan, E. R. (2023). Comparative biology of parasitic nematodes in the genus Angiostrongylus and related genera.. doi.org. https://doi.org/10.1016/bs.apar.2023.05.003

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first checked31 Jul 2026
judged → SUPPORTED · 7831 Jul 2026
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