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Accurate identification of atypical Staphylococcus chromogenes plasma-clotting strains causing bovine mastitis Ciência Rural
Avellar-Costa,Pedro; Santos,Danielle Cabral dos; Lange,Carla Christine; Laport,Marinella Silva; Brito,Maria Aparecida Vasconcelos Paiva; Rossi,Ciro César; Giambiagi-deMarval,Marcia.
ABSTRACT: We compared the potential of routine techniques used for the identification of Staphylococcus species, aiming to evaluate their accuracy in the detection of 43 Staphylococcus chromogenes strains isolated from bovine mastitis that, despite being a coagulase-negative species, are able to clot plasma. These strains could be mistakenly suspected to be S. aureus and lead to an unappropriated treatment of the disease. MALDI-TOF, PCR-RFLP of the chaperonine gene groEL, and sequencing of the 16S rRNA and elongation factor Tu gene tuf were employed. Results from the four methods were coincident for only half of the strains because of the low accuracy of the groEL PCR-RFLP (51.2% accuracy). Even though all the sequencing results were identical, the high...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Staphylococcus chromogenes; Mastitis; MALDI-TOF; Tuf; GroEL.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600452
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Underrated Staphylococcus species and their role in antimicrobial resistance spreading Genet. Mol. Biol.
Rossi,Ciro César; Pereira,Monalessa Fábia; Giambiagi-deMarval,Marcia.
Abstract The increasing threat of antimicrobial resistance has shed light on the interconnection between humans, animals, the environment, and their roles in the exchange and spreading of resistance genes. In this review, we present evidences that show that Staphylococcus species, usually referred to as harmless or opportunistic pathogens, represent a threat to human and animal health for acting as reservoirs of antimicrobial resistance genes. The capacity of genetic exchange between isolates of different sources and species of the Staphylococcus genus is discussed with emphasis on mobile genetic elements, the contribution of biofilm formation, and evidences obtained either experimentally or through genome analyses. We also discuss the involvement of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Horizontal gene transfer; Antimicrobial resistance; Coagulase negative staphylococcus; Biofilm; CRISPR; One Health.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000300303
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Characterization of the omlA gene from different serotypes of Actinobacillus pleuropneumoniae: a new insight into an old approach Genet. Mol. Biol.
Rossi,Ciro César; Araújo,Elza Fernandes de; Queiroz,Marisa Vieira de; Bazzolli,Denise Mara Soares.
The OmlA protein is a virulence factor of Actinobacillus pleuropneumoniae, an important pathogen in pigs. The polymorphisms present in the omlA gene sequence of 15 reference serotypes of A. pleuropneumoniae and non-serotypable isolates were assessed to determine the possible evolutionary relationship among them and to validate the importance of this gene as a molecular marker for the characterization of this bacterium. Divergence among the 15 serotypes of A. pleuropneumoniae probably resulted initially from two major evolutionary events that led to subsequent differentiation into nine groups. This differentiation makes it possible to characterize most of the serotypes by using bionformatics, thereby avoiding problems with immunological cross-reactivity. A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Actinobacillus pleuropneumoniae; OmlA gene; Phylogenetic reconstruction; Porcine pleuropneumonia.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200015
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