Data/hora: 04/06/2024 12:24:30

Biblioteca(s): 	Embrapa Pecuária Sudeste.	
Data corrente: 	06/07/2017	
Data da última atualização: 	21/11/2017	
Autoria: 	PIZAURO, L. J. L.; ALMEIDA, C. C. de; SOLTES, G. A.; SLAVIC, D.; ROSSI JUNIOR, O. D.; AVILA, F. A. de; ZAFALON, L. F.; MACINNES, J. I.	
Afiliação: 	Lucas José Luduverio Pizauro, UNESP; Camila Chioda de Almeida, UNESP; Glenn A. Soltes, University of Guelph; Durda Slavic, University of Guelph; Oswaldo Durival Rossi Junior, UNESP; Fernando Antonio de Avila, UNESP; LUIZ FRANCISCO ZAFALON, CPPSE; Janet I. MacInnes, University of Guelph.	
Título: 	Species level identification of coagulase negative Staphylococcus spp. from buffalo using matrix-assisted laser desorption ionization-time of flight mass spectrometry and cydB real-time quantitative PCR.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Veterinary Microbiology, v. 204, p. 8-14, 2017.	
ISSN: 	0378-1135	
DOI: 	https://doi.org/10.1016/j.vetmic.2017.03.036	
Idioma: 	Inglês	
Conteúdo: 	Incorrect identification of Staphylococcus spp. can have serious clinical and zoonotic repercussions. Accordingly, the aim of this study was to determine if matrix-assisted laser desorption ionization?time of flight mass spectrometry (MALDI-TOF MS) and/or cydB real- time quantitative PCR (qPCR) could be used to accurately identify coagulase negative Staphylococcus spp. (CoNS) obtained from buffalo milk and milking environment samples. Seventy-five of 84 CoNS isolates could be identified to the species level (score value >1.99) using MALDI-TOF MS. However, as determined by cytochrome d ubiquinol oxidase subunit II (cydB) qPCR and by 16S RNA and cydB gene sequencing, 10 S. agnetis strains were wrongly identified as S. hyicus by MALDI-TOF MS. In addition, 9 isolates identified by MALDI-TOF only to the genus level (score values between 1.70 and 1.99) could be identified to species by cydB qPCR. Our findings suggest that MALDI-TOF MS is a reliable method for rapid identification of S. chromogenes and S. epidermidis (species of interest both in human and veterinary medicine) and may be able to correctly identify other Staphylococcus spp. However, at present not all Staphylococcus spp. found in buffalo milk can be accurately identified by MALDI-TOF MS and for these organisms, the cydB qPCR developed in the current study may provide a reliable alternative method for rapid identification of CoNS species.	
Palavras-Chave: 	CydB qPCR; Staphylococcus agnetis.	
Thesaurus Nal: 	milk; Staphylococcus hyicus.	
Categoria do assunto: 	G Melhoramento Genético	
Registro original: 	Embrapa Pecuária Sudeste (CPPSE)	
Exemplares: 	CPPSE - (24073-1) - UPC - AP - DD - PROCI-2017.00019 - PIZ - 2017.00142 - DIS