An obligate parasite or holoparasite is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host. If an obligate parasite cannot obtain a host it will fail to reproduce. This is opposed to a facultative parasite, which can act as a parasite but does not rely on its host to continue its life-cycle. Obligate parasites have evolved a variety of parasitic strategies to exploit their hosts. Holoparasites and some hemiparasites are obligate.
It is advantageous for the parasite to preserve the health of its host when this is compatible with its nutritional and reproductive requirements, except when the death of the host is necessary for transmission.[1]
^Combes, C. (1997) Fitness of Parasites: Pathology and Selection International Journal for Parasitology27 (1): 1–10.
An obligateparasite or holoparasite is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host. If an obligate parasite...
complex. An obligateparasite depends completely on the host to complete its life cycle, while a facultative parasite does not. Parasite life cycles involving...
intracellular parasite, a parasitic microorganism that cannot reproduce without entering a suitable host cell Obligateparasite, a parasite that cannot...
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Honza, Marcel; Røskaft, Eivin (2006). "Eggshell strength of an obligate brood parasite: a test of the puncture resistance hypothesis". Behavioral Ecology...
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[verification needed] If a parasite has to infect a given host in order to complete its life cycle, then it is said to be an obligateparasite of that host; sometimes...
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individuals benefit. Mutualistic relationships may be either obligate for both species, obligate for one but facultative for the other, or facultative for...
distantly related and are not closely related to Polypodium. Also, the obligateparasite Myxobolus cerebralis lives in freshwater. Thus, it appears that in...
the family displays all types of plant parasitism: facultative parasite, obligateparasite, hemiparasites, and holoparasites. Parasitic plants are attached...
is among the medically important Cryptosporidium species. It is an obligateparasite of humans that can colonize the gastrointestinal tract resulting in...
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parvorder, as a result of developments in phylogenetic research. Lice are obligateparasites, living externally on warm-blooded hosts which include every species...
Indomalaya, Australasia, Polynesia and tropical Africa. It is an obligateparasite, meaning it cannot complete its life-cycle without another host plant...
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in hemp and cannabis. It is a non-capsulated strand of RNA and an obligateparasite that requires the presence of a compatible host for its survivability...