Blastocystis

Paul G. Auwaerter, M.D.
Blastocystis is a topic covered in the Johns Hopkins ABX Guide.

To view the entire topic, please or purchase a subscription.

Official website of the Johns Hopkins Antibiotic (ABX), HIV, Diabetes, and Psychiatry Guides, powered by Unbound Medicine. Johns Hopkins Guide App for iOS, iPhone, iPad, and Android included. Explore these free sample topics:

Johns Hopkins Guides

-- The first section of this topic is shown below --

MICROBIOLOGY

  • Parasite commonly found in the intestinal flora of humans. Molecular studies have documented numerous genotypes including usually zoonotic organisms, so B. hominis infection is humans is likely more heterogeneous than suspect.
  • Global presence, found also in animals e.g., swine.
  • Appears as thick-walled cyst (6-40 μm) in human feces [Fig].
  • Taxonomic classification unclear. Based on RNA molecular analysis, B. hominis has been labeled as a stramenopile, similar to a large grouping of one and multi-celled protists such as algae, diatoms and slime molds.
    • B. hominis historically used to denote infection but likely more diverse group of Blastocystis causes human infection.
    • Suggest due to diversity, probably refer to Blastocystis spp. or Blastocystis spp. subtype n (n= subtype number, Stensvold classification).
  • Life cycle not clearly known, likely transmission through fecal-oral routes, with contaminated water a high suspect. Cysts may infect epithelial cells of GI tract.

-- To view the remaining sections of this topic, please or purchase a subscription --

Last updated: November 29, 2015

Citation

* When formatting your citation, note that all book, journal, and database titles should be italicized* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Blastocystis ID - 540610 A1 - Auwaerter,Paul,M.D. Y1 - 2015/11/29/ PB - Johns Hopkins ABX Guide UR - https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540610/all/Blastocystis ER -