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The appearance and behaviour of the sporocysts is a case of aggressive mimicry, where the parasite vaguely resembles the food of the host, thereby gaining the parasite entry into the host's body by being eaten. This is unlike most other cases of aggressive mimicry, in which the mimic eats the duped animal. [13]
Spinochordodes tellinii is a parasitic nematomorph hairworm whose larvae develop in grasshoppers and crickets.This parasite is able to influence its host's behavior: once the parasite is grown, it causes its grasshopper host to jump into water, where the grasshopper will likely drown.
Chordodes formosanus is a horsehair worm that has the praying mantis as its definitive host. Horsehair worms are obligate parasites that pass through different hosts at various stages. These worms can grow up to 90 centimetres (35 in) long and can be extremely dangerous for their host, especially the praying mantis. [1] [2]
After assimilating their host, Parasites exhibit a variety of abilities that make them dangerous adversaries: the immediate area around their entry site (typically the head) is morphed into a versatile "parasite tissue" which can take a variety of offensive and defensive forms, and a parasite that successfully takes over a host's brain can then ...
By way of example, a parasite that reproduces in an intermediate host may require, as part of their life cycle, that the intermediate host be eaten by a predator at a higher trophic level, and some parasites are capable of altering the behavior of the intermediate host to make such predation more likely; [1] [2] a mechanism that has been called ...
At dinner, it is revealed that the parasites are seeking to take over Starfleet, using humanoids as hosts. Riker and Picard subdue the infected men, causing parasites to leave the hosts and flee. One of the parasites scurries under a closed door, where Picard and Riker find Quinn's assistant Remmick eating the parasite.
The life cycle of E. multilocularis involves a primary or definitive host and a secondary or intermediate host, each harboring different life stages of the parasite. Foxes, coyotes, domestic dogs, and other canids are the definitive hosts for the adult stage of the parasite. Cats may also be involved. [3]
As it forces its way into the host cell, the parasite forms a parasitophorous vacuole (PV) membrane from the membrane of the host cell. [2] [36] The PV encapsulates the parasite, and is both resistant to the activity of the endolysosomal system, and can take control of the host's mitochondria and endoplasmic reticulum. [2] [36]