alexa Identifying four Trypanosoma cruzi I isolate haplotypes from different geographic regions in Colombia.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Herrera C, Bargues MD, Fajardo A, Montilla M, Triana O,

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Abstract Trypanosoma cruzi has been classified into the groups T. cruzi I and T. cruzi II. The latter is subdivided into five smaller lineages based on multilocus enzyme electrophoresis and random amplified polymorphic DNA, designated as IIa-IIe, which shows correspondence with rRNA/mini-exon lineages. Twelve previously characterised T. cruzi isolates from different hosts, including humans, Didelphis marsupialis, and triatomines were analysed to establish genetic variability in T. cruzi group T. cruzi I isolates from different geographical regions of Colombia. DNA samples were sequenced based on the mini-exon gene intergenic region. Sequences were analysed using Clustal W, Staden 1.5 and MEGA3 software, and using reported sequences from the GenBank as reference. The genetic distances were analysed using Kimura's two-parameter model. The isolates' joint alignment was of 350bp, and the calculated nucleotide divergence was of 17.5\%. The differences consisted of 23 transitions (7.2\%), 14 transversions (4.4\%) and 19 insertion-deletions (5.9\%). The Colombian T cruzi I isolates revealed sufficient genetic variability for us to propose the existence of four haplotypes identified through single nucleotide polymorphism (SNP) and insertion/deletion found in the mini-exon gene's non-transcribed spacer intergenic region. This article was published in Infect Genet Evol and referenced in Journal of Antivirals & Antiretrovirals

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