Researchers examining Blastocystis isolates from 53 college students report that Blastocystis sp. subtype 3 was the most common (32.1%, 17/53), followed by subtype 7 (9.4%, 5/53), subtype 1 (7.6%, 4/53), subtype 4 (7.6%, 4/53) and subtype 6 (1.9%, 1/53). Subtypes 2 and 5 were not detected in the populations, and 22 subtypes could not be classified by the method used (STS primer amplification). The abstract of the study is available on Pubmed.