Blastocystis hominis

Blas·to·cys·tis hom·i·nis

a species of Blastocystis widespread among humans, formerly considered harmless, now recognized as a rare cause of diarrhea and other intestinal symptoms and eosinophilia when found in heavy infections or immunocompromised hosts.

Blastocystis hominis

A single-celled protozoan parasite isolated from 5–10% of stool specimens in developed countries and up to 50% of specimens in developing countries, especially in those who work with animals.

Clinical findings
B hominis was long known to cause gastrointestinal disease in immunocompromised patients—e.g., recurrent diarrhoea, episodic vomiting, abdominal colic; B hominis infection may be misdiagnosed as irritable bowel syndrome. 

Nomenclature
Experts have proposed dropping hominis, the species name for Blastocystis sp. subtype nn (where nn is the number of each species group). It is phylogenetically included in the group Stramenopiles, which also includes brown algae, mildew, diatoms and the bacteria that caused the Irish potato famine.

Blastocystis hominis

(blăs′tō-sĭs″tĭs hŏm′ĭn-ĭs)
A protozoan once thought to be a harmless commensal in the human gastrointestinal tract but now believed to be an intestinal parasite that produces diarrhea, abdominal pain, bloating, and weight loss in some people.

Blastocystis hominis

a cause of diarrhea in the great apes.
References in periodicals archive ?
Segun la organizacion mundial de la salud (OMS), la prevalencia de infecciones parasitarias causadas por protozoarios es alta respecto a las generadas por helmintos (4), siendo Giardia intestinales, Blastocystis hominis, Entamoeba coli y Complejo Entamoeba los protozoarios con mayor incidencia (1,4).
Blastocystis hominis, Entamoeba histolytica/dispar, and Clostridium difficile.
Diferentes estudios moleculares han comprobado una extensa variabilidad genetica en aislados provenientes de mamiferos, aves, anfibios y humanos (2), razon por la cual la denominacion Blastocystis hominis ha sido reemplazada por Blastocystis sp.
Eh-Entamoeba histolytica/dispar, Gl- Giardia lamblia, Bh- Blastocystis hominis.
The most frequent protozoa and helminths were Blastocystis hominis and hook worm, with the prevalence rates of 2.
The association of urticaria with the following parasites has been reported: Giardia lamblia, Fasciola hepatica, Toxocara canis, Echinococcus granulosus, Strongyloides stercoralis, Hymenolepis nana, Blastocystis hominis, Ascaris lumbricoides, Anisakis simplex, Cimexlectularius (bedbug), Argas reflexus (bird tick).
Gastrointestinal tract: multiple parasitic infections--Cryptosporidium, Blastocystis hominis, giardia, tapeworms--yeast infections, residues of antibiotics, herbicides, pesticides, and inorganic and organic types of mercury.
domestica en Lima-Peru, hallando los siguientes especies: Endolimax nana, Blastocystis hominis, Entamoeba hartmanni, Entamoeba coli, Cyclospora cayetanensis, Giardia lamblia y Toxocara canis.