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Long-term, symbiotic relationship
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- Parasitism is a long-term, symbiotic relationship in which one organism, the parasite, lives on or within another organism, the host. The parasite derives nutrients, shelter, or other resources from the host, often harming the host’s well-being.
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- Obligate Parasitism
- Facultative Parasitism
- Ectoparasitism
- Endoparasitism
- Mesoparasitism
This is the kind of parasitism in which the parasite is completely dependent on the host to complete its life cycle. Obligate parasites cannot survive without the host. Therefore, they do not severely harm the host. Fungi, bacteria and viruses exhibit obligate parasitism. For eg., head lice, when removed from the human scalp, dies.
In this kind of parasitism, the parasite is not completely dependent on the host to complete its life cycle and can survive without the host. A nematode species Strongyloides stercoralis is found free-living but causes a disease strongyloidiasis when it infects humans.
The parasites that live outside the body of the host exhibit ectoparasitism. For eg., lice and ticks
Parasites that live inside the body of a host exhibit endoparasitism. For eg., hookworms and nematodes.
The parasites that enter the external openings of the host exhibit mesoparasitism. The organisms that parasitize humans include fungi, leeches, lice, viruses, protozoa, tapeworm, etc. Few organisms such as Helminthes live inside the intestine of the host and causes several infectious diseases, such as jaundice, malnutrition, diarrhoea, etc. All the...
Apr 28, 2017 · Parasitism is a type of symbiotic relationship, or long-term relationship between two species, where one member, the parasite, gains benefits that come at the expense of the host member.
3 days ago · Parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism. Parasites may be characterized as ectoparasites, which live on the body surface of the host, or endoparasites, which live within a host’s body.
- The Editors of Encyclopaedia Britannica
There are six major parasitic strategies, namely parasitic castration; directly transmitted parasitism; trophically-transmitted parasitism; vector-transmitted parasitism; parasitoidism; and micropredation. These apply to parasites whose hosts are plants as well as animals.
Aug 30, 2022 · Parasitism is a symbiotic relationship between two species in which one organism benefits, while the other suffers harm. The parasite species gains the advantage, while the host species experiences the harm. For example, fleas are a parasite of dogs and cats (their host).
Aug 3, 2023 · Parasitism is of different types depending on the size, characteristics, interaction with the host, and their life cycles. Some of the parasites can exist in multiple classifications depending on the basis of classification. Table of Contents. 1. Obligate Parasitism. Example- Rickettsia. 2. Facultative Parasitism. Example- Armillaria species. 3.
