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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Molecular and antimicrobial susceptibility profiling of atypical Streptococcus species from porcine clinical specimens

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Author(s):
Moreno, Luisa Z. ; Matajira, Carlos E. C. ; Gomes, Vasco T. M. ; Silva, Ana Paula S. ; Mesquita, Renan E. ; Christ, Ana Paula G. ; Sato, Maria Ines Z. ; Moreno, Andrea M.
Total Authors: 8
Document type: Journal article
Source: INFECTION GENETICS AND EVOLUTION; v. 44, p. 376-381, OCT 2016.
Web of Science Citations: 2
Abstract

The Streptococcus species present broad phenotypic variation, making identification difficult using only traditional microbiological methods. Even though Streptococcus suis is the most important species for the worldwide swine industry, other Streptococcus species appear to be able to cause disease in swine and could represent a higher underestimated risk for porcine health. The aim of this study was to identify Streptococcus-like isolates by MALDI-TOFMS and 16S rRNA sequencing and further molecular and antibiotic susceptibility characterization of the atypical Streptococcus species capable of causing disease in swine. Fifty presumptive Streptococcus isolates from diseased pigs isolated from different Brazilian States between 2002 and 2014 were evaluated. Among the studied isolates, 26% were identified as Streptococcus hyovaginalis, 24% as Streptococcus plurianimalium, 12% as Streptococcus alactolyticus, 10% as Streptococcus hyointestinalis, and the remaining isolates belonged to Streptococcus henryi (6%), Streptococcus thoraltensis (6%), Streptococcus gallolyticus (6%), Streptococcus gallinaceus (4%), Streptococcus sanguinis (4%), and Streptococcus mitis (2%). The Streptococcus isolates were successfully identified by spectral cluster analysis and 16S rRNA sequencing with 96% of concordance between the techniques. The SE-AFLP analysis also supported Streptococcus species distinction and enabled further observation of higher genetic heterogeneity intra-species. The identified Streptococcus species presented variable MIC values to beta-lactams, enrofloxacin and florfenicol, and high resistance rates to tetracyclines and macrolides, which appear to be directly related to the industry's antimicrobial usage and resistance selection. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/17136-2 - Characterization of Leptospira strains isolated in Brazil by Pulsed Field Gel Electrophoresis (PFGE) typing and comparative genomic analysis
Grantee:Luisa Zanolli Moreno
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/26159-1 - Comparative genome analysis of Streptococcus suis strains isolated from swine in Brazil
Grantee:Carlos Emilio Cabrera Matajira
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/16946-0 - Phenotypic and genotypic characterization of strains of Salmonella enterica isolated from pork in São Paulo
Grantee:Vasco Túlio de Moura Gomes
Support type: Scholarships in Brazil - Doctorate