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Entire sequencing of high-molecular weight resistance plasmids carrying the most frequent antimicrobial resistance genes found in Enterobacteriaceae

Grant number: 12/24864-1
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): May 13, 2013
Effective date (End): December 12, 2013
Field of knowledge:Biological Sciences - Genetics - Molecular Genetics and Genetics of Microorganisms
Principal Investigator:Ana Lúcia da Costa Darini
Grantee:Renata Galetti
Supervisor abroad: Alessandra Carattoli
Home Institution: Faculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Local de pesquisa : Istituto Superiore di Sanità (ISS), Italy  


Bacterial resistance to antibiotics is mainly due to acquisition of extrachromosomal elements of other bacteria, including transposons, integrons, plasmids and prophages, wich are exchanged between bacteria by processes such as transformation, conjugation, and transduction. Plasmids are the most relevant mobile genetic elements due to their ability to promote horizontal gene transfer between different bacterial genera by conjugation. The main ²-lactams and fluoroquinolones resistance genes are located on plasmids as other resistance determinants. Some methods are used for plasmids typing in Enterobacteriaceae and Acinetobacter spp.- PCR-based replicon typing (PBRT and AB-PBRT, respectively) was developed and are accomplished, but some plasmids are difficult to identify and classify, as well as they can not be typed by these schemes, and more "aggressive" approaches as the complete sequencing of DNA are necessary. In this study pyrosequencing technique will be applied that allows complete sequencing of the plasmids. The strategy used in Italy to Enterobacteriaceae plasmids could be used in further studies of plasmids sequencing of non-fermenting bacterial, as Pseudomonas aeruginosa. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CARATTOLI, A.; FORTINI, D.; GALETTI, R.; GARCIA-FERNANDEZ, A.; NARDI, G.; ORAZI, D.; CAPONE, A.; MAJOLINO, I.; PROIA, A.; MARIANI, B.; PARISI, G.; MORRONE, A.; PETROSILLO, N. Isolation of NDM-1-producing Pseudomonas aeruginosa sequence type ST235 from a stem cell transplant patient in Italy, May 2013. EUROSURVEILLANCE, v. 18, n. 46, p. 5-7, NOV 14 2013. Web of Science Citations: 10.

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