Send to

Choose Destination
Parasitol Res. 2009 Dec;106(1):263-8. doi: 10.1007/s00436-009-1658-8. Epub 2009 Oct 22.

PCR-based subtyping of Blastocystis isolates from symptomatic and asymptomatic individuals in a major hospital in Ankara, Turkey.

Author information

Department of Medical Microbiology, Gazi University Faculty of Medicine, Besevler, Ankara, Turkey.


The stool samples obtained from 94 patients with gastrointestinal symptoms and 109 asymptomatic individuals, who checked in due to other reasons, admitted at a major hospital in Ankara, Turkey were examined with native Lugol's iodine, trichrome, and Kinyoun's acid-fast stainings for parasitology examinations and with in vitro culture method for detection of Blastocystis. In a total of 203 stool samples tested, native Lugol's iodine and trichrome stainings could detect 12 (5.9%) and 20 (9.9%) positive samples for Blastocystis, respectively. Conversely, culture method could detect 66 (32.5%) positive samples, and this method was more sensitive compared to the both microscopic examinations (p < 0.001). Among 66 positive samples for Blastocystis, 27 were from symptomatic patients and 39 were from asymptomatic group. Subtypes (STs) were determined by PCR using seven different sequence-tagged site primers. ST3 was the most dominant in both symptomatic and asymptomatic groups and followed by ST1 or ST2. There were mixed infections with STs 1 and 2 or STs 1 and 3 in nine isolates. There was no statistical significance of the distribution of Blastocystis sp. subtypes between symptomatic and asymptomatic individuals (p > 0.05).

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Springer
Loading ...
Support Center