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Karyotypic diversity among Blastocystis hominis isolates
J A Carbajal1, L del Castillo, M D Lanuza
1Servicio de Microbiología, Hospital Clínico Universitario, Valencia, Spain.
International Journal for Parasitology
|August 1, 1997
Summary
This study analyzed Blastocystis hominis chromosomal patterns using CHEF electrophoresis. Findings reveal distinct karyotypes and chromosome similarities among isolates, aiding in parasite classification.
Area of Science:
- Microbiology
- Genetics
Background:
- Blastocystis hominis is a common intestinal protozoan parasite.
- Understanding its genetic diversity is crucial for epidemiological studies.
Purpose of the Study:
- To analyze the chromosomal patterns of Blastocystis hominis isolates.
- To determine the genetic similarity and karyotypic profiles of different strains.
Main Methods:
- Utilized contour-clamped homogeneous electric-field (CHEF) electrophoresis for chromosomal analysis.
- Analyzed 15 Blastocystis hominis strains (13 axenic, 2 monoxenic).
- Calculated genetic similarity using the Jaccard index.
Main Results:
- Detected 9 to 13 chromosomes per isolate, ranging from 2200 kbp to 260 kbp.
- Identified 11 karyotypic profiles, with a common pattern of 8 chromosomes.
- Clustered isolates into 3 distinct karyotypes (A, B, C) based on chromosomal patterns.
- Observed characteristic chromosomal bands differentiating karyotypes.
Conclusions:
- Blastocystis hominis exhibits significant chromosomal diversity.
- CHEF analysis effectively differentiates Blastocystis hominis isolates into distinct karyotypes.
- Karyotypic profiling provides a valuable tool for classifying Blastocystis hominis strains.