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Blastocystis is a genus of single-celled parasites belonging to the Stramenopiles that includes algae, diatoms, and water molds.There are several species, living in the gastrointestinal tracts of species as diverse as humans, farm animals, birds, rodents, reptiles, amphibians, fish, and cockroaches. [2]
Blastocystis hominis is a single-celled eukaryotic organism that inhabits the gastrointestinal tract of humans and various animals. [1] This stramenopile exhibits significant genetic diversity and has become an organism of increasing scientific interest due to its widespread distribution and controversial role in human health. [ 2 ]
Percentage of Blastocystis infections detected by direct microscopy in various studies. For identification of infection, the only method clinically available in most areas is the ova and parasite (O&P) exam, which identifies the presence of the organism by microscopic examination of a chemically preserved stool specimen.
Blastocystis spp. intestinal direct microscopy of stool (PCR, antibody) • worldwide: one of the most common human parasites [1] [2] • Developing regions: infects 40–100% of the total populations [1] [2] [3] eating food contaminated with feces from an infected human or animal Cryptosporidiosis: Cryptosporidium spp. intestines stool widespread
Blastocystis is a gastrointestinal parasite of humans; [27] opalines and proteromonads live in the intestines of cold-blooded vertebrates and have been described as parasitic; [28] oomycetes include some significant plant pathogens such as the cause of potato blight, Phytophthora infestans. [29]
Blastocystis is a single-celled protozoan which infects the large intestine. Physicians report that patients with infection show symptoms of abdominal pain, constipation, and diarrhea. [54] [55] [56] One study found that 43% of IBS patients were infected with Blastocystis versus 7% of controls. [49]
Recent in-vitro host-Blastocystis interaction studies of phenotypic characteristics indicate that Blastocystis subtypes 3, 5, and 7 correlate well with the pathogenic form of this diseases. Transmission electron microscopy has revealed that these sub-types have polymorphic amoeboid forms containing a large central vacuole that is completely ...
Blastocystis species Blastocystosis: microscopic examination of a chemically preserved stool specimen Lack of scientific study to support the efficacy of any particular treatment No Blastomyces dermatitidis: Blastomycosis: KOH prep, cytology, or histology Itraconazole or ketoconazole: No Machupo virus: Bolivian hemorrhagic fever: No