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People with delusional parasitosis believe that "parasites, worms, mites, bacteria, fungus" or similar organisms have infected them. Reasoning or logic cannot change this fixed, false belief. [ 5 ] Symptoms can differ among those with the condition.
Major groups of parasites include protozoans (organisms having only one cell) and parasitic worms (helminths). Of these, protozoans, including cryptosporidium, microsporidia, and isospora, are most common in HIV-infected persons. Each of these parasites can infect the digestive tract, and sometimes two or more can cause infection at the same time.
The matchbox sign, also referred to as the Ziploc bag sign or the specimen sign, is a psychiatric medical sign in which a patient arrives at a doctor's office with items extracted from the skin; these items are intended to serve as proof of a parasitic infestation, and are typically stored in a small container such as a matchbox.
Since the parasite can change the host's immune response, it may also have an effect, positive or negative, on the immune response to other pathogenic threats. [34] This includes, but is not limited to, the responses to infections by Helicobacter felis , Leishmania major , or other parasites, such as Nippostrongylus brasiliensis .
Parasites often have complex life cycles and can infect humans in a number of ways including through insect vectors, contact with soil, or direct ingestion. [3] Parasites can affect the lungs in a number of mechanisms, including as a direct infection, while migrating to other organs, or through an inflammatory response to a toxin (see loeffler's syndrome).
Trichomonas foetus is a parasite that resides in the urogenital tract of cattle and causes bovine trichomoniasis. Trichomoniasis is a sexually transmitted disease that causes infertility in heifers. Most infertility is caused by sudden embryonic death. [9] Various imidazoles have been used to treat infected bulls, but none are safe and effective.
Parasites are organisms which derive sustenance from its host while causing it harm. [2] The study of parasites and parasitic diseases is known as parasitology. [3] Medical parasitology is concerned with three major groups of parasites: parasitic protozoa, helminths, and parasitic arthropods. [2]
Neurocysticercosis manifests with various signs and symptoms, influenced by the location, number of lesions, and immune response. While some people may have no symptoms, others may experience seizures, increased pressure in the skull, cognitive impairment, or specific neurological problems. In severe cases, the condition can be life-threatening.
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