Culture isolation and molecular identification of Blastocystis sp. in Brazilian human isolates: preliminary results.

Culture isolation and molecular identification of Blastocystis sp. in Brazilian human isolates: preliminary results. Rev Inst Med Trop Sao Paulo. 2020;62:e51 Authors: Melo GB, Roldan W, Malta FM, Lescano SAZ, Castilho VL, Gonçalves EMDN, Paula FM, Gryschek RCB Abstract Blastocystis sp. is a protist commonly found in stool samples of humans and animals. Biological and genetic factors of this organism remain controversial. The present study aimed to develop and implement the Blastocystis in vitro culture of Brazilian human isolates for routine use. The fecal isolates (n = 20) were maintained in our laboratory by several passages in Pavlova's medium. Cultures were monitored every 72 h by light microscopy. Genomic DNA was extracted to identify the subtypes (STs). In most isolates, the vacuolar form was prevalent. The amoeboid, granular and cystic forms were observed during in vitro cultivation. STs 1, 2, 3, 4 and 7 were identified. Our preliminary results show the generation time and forms present in the in vitro culture of Blastocystis subtypes isolated from Brazilian human isolates. Therefore, we emphasize the use of in vitro culture as a tool in future studies for the better understanding of the biological aspects of Blastocystis sp. PMID: 32667389 [PubMed - in process]
Source: Revista do Instituto de Medicina Tropical de Sao Paulo - Category: Tropical Medicine Authors: Tags: Rev Inst Med Trop Sao Paulo Source Type: research