Use of random amplified polymorphic DNA (RAPD) analysis for the identification of Giardia intestinalis subtypes and phylogenetic tree construction
Language English Country United States Media print
Document type Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Species Specificity MeSH
- Phylogeny * MeSH
- Giardia lamblia classification genetics isolation & purification MeSH
- Giardiasis classification genetics MeSH
- Cats MeSH
- Rats MeSH
- Humans MeSH
- Polymerase Chain Reaction methods MeSH
- Dogs MeSH
- Mammals parasitology MeSH
- Random Amplified Polymorphic DNA Technique * MeSH
- Animals MeSH
- Check Tag
- Cats MeSH
- Rats MeSH
- Humans MeSH
- Dogs MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Evaluation Study MeSH
- Research Support, Non-U.S. Gov't MeSH
A comparison of random amplified polymorphic DNA (RAPD) was used to investigate genetic polymorphisms among 25 isolates of Giardia intestinalis and to assess the utility of RAPD for subtype detection and genealogical analysis. Using data obtained for six human and 19 animal-derived isolates in polymerase chain reactions using 13 different primers, phylogenetic trees were constructed and bootstrap values computed by the program FreeTree. Three major clades were distinguished, corresponding to previously defined genetic assemblages A, B, and E. The purported specificity of assemblage E genotypes for artiodactyl hosts was supported. Assemblages A and B showed wide host spectra, including human and animal hosts. No correlation was found between the genotype of analyzed isolates and the presence or absence of the double-stranded RNA Giardiavirus. The results indicate that RAPD data provide reliable genetic information that can be used for both "fingerprinting" and genealogical purposes.
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