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Molecular Strain Typing of Brucella abortus Isolates from Italy by Two VNTR Allele Sizing Technologies

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Abstract

Brucellosis, one of the most important re-emerging zoonoses in many countries, is caused by bacteria belonging to the genus Brucella. Furthermore these bacteria represent potential biological warfare agents and the identification of species and biovars of field strains may be crucial for tracing back source of infection, allowing to discriminate naturally occurring outbreaks instead of bioterrorist events. In the last years, multiple-locus variable-number tandem repeat analysis (MLVA) has been proposed as complement of the classical biotyping methods and it has been applied for genotyping large collections of Brucella spp. At present, the MLVA band profiles may be resolved by automated or manual procedures. The Lab on a chip technology represents a valid alternative to standard genotyping techniques (as agarose gel electrophoresis) and it has been previously used for Brucella genotyping. Recently, a new high-throughput genotyping analysis system based on capillary gel electrophoresis, the QIAxcel, has been described. The aim of the study was to evaluate the ability of two DNA sizing equipments, the QIAxcel System and the Lab chip GX, to correctly call alleles at the sixteen loci including one frequently used MLVA assay for Brucella genotyping. The results confirmed that these technologies represent a meaningful advancement in high-throughput Brucella genotyping. Considering the accuracy required to confidently resolve loci discrimination, QIAxcel shows a better ability to measure VNTR allele sizes compared to LabChip GX.

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Authors and Affiliations

  1. Histology and Molecular Biology Section, Army Medical and Veterinary Research Center, Via Santo Stefano Rotondo 4, 00184, Rome, Italy

    Riccardo De Santis, Andrea Ciammaruconi, Valentina Pittiglio, Silvia Fillo & Florigio Lista

  2. Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, (Istituto G. Caporale), Teramo, Italy

    Massimo Ancora, Fabrizio De Massis, Katiuscia Zilli & Elisabetta Di Giannatale

Authors
  1. Riccardo De Santis
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  2. Massimo Ancora
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  3. Fabrizio De Massis
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  4. Andrea Ciammaruconi
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  5. Katiuscia Zilli
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  6. Elisabetta Di Giannatale
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  7. Valentina Pittiglio
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  8. Silvia Fillo
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  9. Florigio Lista
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Correspondence to Florigio Lista.

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De Santis, R., Ancora, M., De Massis, F. et al. Molecular Strain Typing of Brucella abortus Isolates from Italy by Two VNTR Allele Sizing Technologies. Mol Biotechnol 55, 101–110 (2013). https://doi.org/10.1007/s12033-013-9659-3

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  • DOI: https://doi.org/10.1007/s12033-013-9659-3

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