Naslov
Target gene sequencing to characterize the penicillin G susceptibility of Neisseria meningitidis

Autori
Taha, M. K. ; Vázquez, J. A. ; Hong, E. ; Bennett, D. E. ; Bertrand, S. ; Bukovski, Suzana ; Cafferkey, M. T. ; Carion, F. ; Christensen, J. J. ; Diggle, M. ; Edwards, G. ; Enríquez, R. ; Fazio, C. ; Frosch, M. ; Heuberger, S. ; Hoffmann, S. ; Jolley, K. A. ; Kadlubowski, M. ; Kechrid, A. ; Kesanopoulos, K. ; Kriz, P. ; Lambertsen, L. ; Levenet, I. ; Musilek, M. ; Paragi, M. ; Saguer, A. ; Skoczynska, A. ; Stefanelli, P. ; Thulin, S. ; Tzanakaki, G. ; Unemo, M. ; Vogel, U. ; Zarantonelli, M. L.

Izvornik
Antimicrobial agents and Chemotherapy (0066-4804) 51 (2007), 8; 2784-2792

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Neisseria meningitidis

Sažetak
Clinical isolates of Neisseria meningitidis with reduced susceptibility to penicillin G (intermediate isolates, Pen(I)) harbor alterations in the penA gene encoding the penicillin binding protein 2 (PBP2). A 402-bp DNA fragment in the 3' half of penA was sequenced from a collection of 1, 670 meningococcal clinical isolates from 22 countries that spanned 60 years. Phenotyping, genotyping, and the determination of MICs of penicillin G were also performed. A total of 139 different penA alleles were detected with 38 alleles that were highly related, clustered together in maximum-likelihood analysis and corresponded to the penicillin G-susceptible isolates. The remaining 101 penA alleles were highly diverse, corresponded to different genotypes or phenotypes, and accounted for 38% of isolates, but no clonal expansion was detected. Analysis of the altered alleles that were represented by at least five isolates showed high correlation with the Pen(I) phenotype. The deduced amino acid sequence of the corresponding PBP2 comprised five amino acid residues that were always altered. This correlation was not complete for rare alleles, suggesting that other mechanisms may also be involved in conferring reduced susceptibility to penicillin. Evidence of mosaic structures through events of interspecies recombination was also detected in altered alleles. A new website was created based on the data from this work (http://neisseria.org/nm/typing/penA). These data argue for the use of penA sequencing to identify isolates with reduced susceptibility to penicillin G and as a tool to improve typing of meningococcal isolates, as well as to analyze DNA exchange among Neisseria species.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

Napomena
Dr. Suzana Bukovski je aktivan istraživač na projektu

POVEZANOST RADA