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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 ]
Blastocystis cysts have been shown to be resistant to chlorination as a treatment method [42] and are among the most resistant cysts to ozone treatment. [ 43 ] Contaminated Food : Contamination of leafy vegetables has been implicated as a potential source for transmission of Blastocystis infection, as well as other gastrointestinal protozoa. [ 44 ]
Protozoal infections can cause symptoms that mirror specific IBS subtypes, [51] e.g., infection by certain substypes of Blastocystis hominis (blastocystosis). [52] [53] Many people regard these organisms as incidental findings, and unrelated to symptoms of IBS.
Dosage typically includes information on the number of doses, intervals between administrations, and the overall treatment period. [3] For example, a dosage might be described as "200 mg twice daily for two weeks," where 200 mg represents the individual dose, twice daily indicates the frequency, and two weeks specifies the duration of treatment.
Blastocystis hominis, a human parasite Sarcoptes scabiei var. hominis , a human mite subspecies Staphylococcus hominis , a species of Staphylococcus found in humans
Dogs and humans frequently acquire blastomycosis from the same exposure event. [15] In most such cases, the infection in the dog becomes apparent before the human infection. [15] This may be due to a shortened incubation period, caused by the dog inhaling larger quantities of Blastomyces spores than the human. [15]
Cryptosporidium hominis, along with Cryptosporidium parvum, is among the medically important Cryptosporidium species. [1] It is an obligate parasite of humans that can colonize the gastrointestinal tract resulting in the gastroenteritis and diarrhea characteristic of cryptosporidiosis .