title: Use of PCR amplification of tRNA gene-linked short tandem repeats for genotyping Entamoeba histolytica.
abstract: We have developed a reliable method for PCR-based genotyping of Entamoeba histolytica based on variation in the numbers of short tandem repeats that are linked to tRNA genes in this species. Species-specific primer pairs were designed that differentiate E. histolytica from E. dispar as well as that reveal intraspecies PCR product length polymorphisms. The primers were tested with samples from different parts of the world, and DNA was extracted from cultured cells as well as liver abscess pus and feces by various methods. We now have the tools necessary to investigate a possible link between parasite genotype and the outcome of infection with Entamoeba histolytica, as well as other aspects of the organism's epidemiology.
authors.affiliation: Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, United Kingdom.
authors.forename: Ibne Karim M
authors.initials: IK
authors.lastname: Ali
authors.forename: Mehreen
authors.initials: M
authors.lastname: Zaki
authors.forename: C Graham
authors.initials: CG
authors.lastname: Clark
mesh_terms: D000818:Animals; D017931:DNA Primers; D016054:DNA, Protozoan / Q000032:analysis; D004404:Dysentery, Amebic / Q000175:diagnosis / Q000469:parasitology*; D004748:Entamoeba histolytica / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D004749:Entamoebiasis / Q000175:diagnosis / Q000469:parasitology*; D005838:Genotype; D006801:Humans; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods*; D012343:RNA, Transfer / Q000235:genetics*; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D020080:Tandem Repeat Sequences / Q000235:genetics*
chemical_list: D017931:DNA Primers; D016054:DNA, Protozoan; D012343:RNA, Transfer