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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 ...
The female has a cylindrical body, longer and thinner than the male's (1.2 to 1.6 cm long by 0.016 cm wide). It has the general appearance of a roundworm. The female parasite is darker, and it looks gray. The darker color is due to the presence of a pigment in its digestive tube. [8] This pigment is derived from the digestion of blood.
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 ...
Schistosoma is a genus of trematodes, commonly known as blood flukes.They are parasitic flatworms responsible for a highly significant group of infections in humans termed schistosomiasis, which is considered by the World Health Organization to be the second-most socioeconomically devastating parasitic disease (after malaria), with hundreds of millions infected worldwide.
Individuals sort out opposite sexes. The female body becomes enveloped within the rolled-up gynaecophoric canal of the male; thus, becoming partners for life. Sexual maturation is attained after 4–6 weeks of initial infection. A female generally lays 500–1,000 eggs in a day. [27] The female only leaves the male briefly for laying eggs.
The larvae develop into adult worms over the course of a year, and reach sexual maturity in the afferent lymphatic vessels. After mating, the adult female worm can produce thousands of microfilariae that migrate into the bloodstream. A mosquito vector can bite the infected human host, ingest the microfilariae, and thus repeat the lifecycle.
The others include the spirorchiids (turtle parasites) and the sanguinicolids (fish parasites). The Schistosomatidae are considered venous system specialists and their sister group are vascular system generalists - the Spirorchiidae. Schistosomatidae differ from other blood flukes in having separate sexes and homeothermic hosts. They have ...
The thin, clear majority of the body (the anterior, whip-like end) is the esophagus, and it is the end that the worm threads into the mucosa of the colon. The widened, pinkish-gray region of the body is the posterior, and it is the end that contains the parasite's intestines and reproductive organs.