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The pinworm (genus Enterobius) is a type of roundworm (nematode), and three species of pinworm have been identified with certainty. [15] Humans are hosts only to Enterobius vermicularis (formerly Oxyurias vermicularis). [16] Chimpanzees are host to Enterobius anthropopitheci, which is morphologically distinguishable from the human pinworm. [5]
[9] [11] [18] [19] Although pinworms do not strictly multiply inside the body of their human host, [9] some of the pinworm larvae may hatch on the anal mucosa, and migrate up the bowel and back into the gastrointestinal tract of the original host. [9] [18] This process is called retroinfection.
Parasitic worms cannot reproduce entirely within their host's body; they have a life cycle that includes some stages that need to take place outside of the host. [3] Helminths are able to survive in their mammalian hosts for many years due to their ability to manipulate the host's immune response by secreting immunomodulatory products. [4]
Oxyuroidea is composed on three families: Pharyngodonidae; parasites of herbivorous vertebrates, and Oxyuridae and Heteroxynematidae; parasites of mammals and some birds. The life cycle of G. batrachiensis is generally simple and direct. Adult worms live in the posterior gut of the aquatic larval stage, or tadpole, of an anuran host. The ...
Earthworms have many internal parasites, including protozoa, platyhelminthes, mites, and nematodes; they can be found in the worms' blood, seminal vesicles, coelom, or intestine, or in their cocoons (e.g. the mite Histiostoma murchiei is a parasite of earthworm cocoons [53]).
Main article: Human parasite Endoparasites Protozoan organisms Common name of organism or disease Latin name (sorted) Body parts affected Diagnostic specimen Prevalence Source/Transmission (Reservoir/Vector) Granulomatous amoebic encephalitis and Acanthamoeba keratitis (eye infection) Acanthamoeba spp. eye, brain, skin culture worldwide contact lenses cleaned with contaminated tap water ...
Human parasites are divided into endoparasites, which cause infection inside the body, and ectoparasites, which cause infection superficially within the skin. The cysts and eggs of endoparasites may be found in feces , which aids in the detection of the parasite in the human host while also providing the means for the parasitic species to exit ...
Experiments have involved a wide range of parasites, diseases, and hosts. The effects on humans have been of special interest. The tendency of many parasitic worms to pacify the host's immune response allows them to mollify some diseases, while worsening others. [1]