期刊
MICROBIOLOGICAL RESEARCH
卷 165, 期 3, 页码 243-249出版社
ELSEVIER GMBH
DOI: 10.1016/j.micres.2009.03.003
关键词
Staphylococcus aureus; S. epidermidis; S. haemolyticus; Methicillin resistance; Blood multiplex PCR
类别
资金
- Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento Pessoal de Nivel Superior (CAPES)
- Fundacao Universitaria Jose Bonifacio (FUJB)
- Agencia Nacional de Vigilancia Sanitaria (ANVISA)
- Programa de Nucleos de Excelencia (PRONEX)
In this study, we standardized and evaluated a multiplex-PCR methodology using specific primers to identify Staphylococcus aureus, Staphylococcus epidermidis and Staphylococcus haemolyticus and their methicillin-resistance directly from blood cultures. Staphylococci clinical isolates (149) and control strains (16) previously identified by conventional methods were used to establish the multiplex PCR protocol. Subsequently, this methodology was evaluated using a fast and cheap DNA extraction protocol from 25 staphylococci positive blood cultures. A wash step of the pellet with 0.1% bovine serum albumin (BSA) solution was performed to reduce PCR inhibitors. Amplicons of 154 bp (mecA gene), 271 bp (S. haemolyticus mvaA gene) and 108 and 124 bp (S. aureus and S. epidermidis species specific fragments, respectively) were observed. Reliable results were obtained for 100% of the evaluated strains, suggesting that this new multiplex-PCR combined with an appropriate DNA-extraction method could be useful in the laboratory for fast and accurate identification of three staphylococci species and simultaneously their methicillin resistance directly in blood cultures. (C) 2009 Elsevier GmbH. All rights reserved.
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