Blastocystosis


![Percentage of stool samples from US states found to contain various protozoa in 1987 and 2000[93]](/uploads/202412/31/BLASTO_COMPARISON_US_RATES0738.png)
![Number of stool samples from Canadian Lab found to contain various protozoa in 2005[94]](/uploads/202412/31/HISTORY_OF_EMERGING_CMAJ_20050738.png)
Blastocystosis refers to a medical condition caused by infection with Blastocystis. Blastocystis is a protozoal, single-celled parasite that inhabits the gastrointestinal tracts of humans and other animals. Many different types of Blastocystis exist, and they can infect humans, farm animals, birds, rodents, amphibians, reptiles, fish, and even cockroaches.