Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/87955 |
Resumo: | Introduction: Resistance to macrolides, lincosamides and streptogramins B (MLSB antibiotics) in staphylococci may be due to modification in ribosomal target methylase encoded by erm genes. The expression of MLSB resistance lead to three phenotypes, namely constitutive resistance (cMLSB), inducible resistance (iMLSB), and resistance only to macrolides and streptogramins B (MSB). The iMLSB resistance is the most difficult to detect in the clinical laboratory. Objective: This study investigated the expression of MLSB resistance and the prevalence of the erm genes among 152 clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococcus (CNS) from Hospital de Clínicas de Porto Alegre. Methods: Primary MLSB resistance was detected by the disk diffusion method. Isolates with iMLSB phenotype were tested by double-disk induction method. All isolates were tested by a genotypic assay, PCR with specific primers. Results: A total of 46.7% of staphylococci were positive for cMLSB; 3.3% for iMLSB and 3.3% for MSB. One or more erm genes were present in 50.1% of isolates. The gene ermA was detected in 49 isolates, ermC in 29 and ermB in 3. Conclusion: The prevalence of the ermA, ermB and ermC genes were 29.6%, 17.1% and 0.66% respectively, and constitutive resistance was the most frequent as compared to the other two phenotypes. |
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Coutinho, Vivian de Lima SpodePaiva, Rodrigo MinutoReiter, Keli CristineParis, Fernanda deBarth, Afonso LuisMachado, Alice Beatriz Mombach Pinheiro2014-02-28T01:50:33Z20101413-8670http://hdl.handle.net/10183/87955000872523Introduction: Resistance to macrolides, lincosamides and streptogramins B (MLSB antibiotics) in staphylococci may be due to modification in ribosomal target methylase encoded by erm genes. The expression of MLSB resistance lead to three phenotypes, namely constitutive resistance (cMLSB), inducible resistance (iMLSB), and resistance only to macrolides and streptogramins B (MSB). The iMLSB resistance is the most difficult to detect in the clinical laboratory. Objective: This study investigated the expression of MLSB resistance and the prevalence of the erm genes among 152 clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococcus (CNS) from Hospital de Clínicas de Porto Alegre. Methods: Primary MLSB resistance was detected by the disk diffusion method. Isolates with iMLSB phenotype were tested by double-disk induction method. All isolates were tested by a genotypic assay, PCR with specific primers. Results: A total of 46.7% of staphylococci were positive for cMLSB; 3.3% for iMLSB and 3.3% for MSB. One or more erm genes were present in 50.1% of isolates. The gene ermA was detected in 49 isolates, ermC in 29 and ermB in 3. Conclusion: The prevalence of the ermA, ermB and ermC genes were 29.6%, 17.1% and 0.66% respectively, and constitutive resistance was the most frequent as compared to the other two phenotypes.application/pdfengThe Brazilian journal of infectious diseases. Vol. 14, no. 6 (2010), p. 564-568MacrolídeosStaphylococcusEritromicinaerm genesmacrolidesresistanceStaphylococcusDistribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolatesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000872523.pdf000872523.pdfTexto completo (inglês)application/pdf854698http://www.lume.ufrgs.br/bitstream/10183/87955/1/000872523.pdf68fb40238e14ac7f4e25a86e057f008dMD51TEXT000872523.pdf.txt000872523.pdf.txtExtracted Texttext/plain22004http://www.lume.ufrgs.br/bitstream/10183/87955/2/000872523.pdf.txt98e9cc4b93ac610faff83df38917db9eMD52THUMBNAIL000872523.pdf.jpg000872523.pdf.jpgGenerated Thumbnailimage/jpeg1874http://www.lume.ufrgs.br/bitstream/10183/87955/3/000872523.pdf.jpg5c8d0379b7d87dd6f6e97e61ed5ec348MD5310183/879552023-06-15 03:27:56.571964oai:www.lume.ufrgs.br:10183/87955Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-06-15T06:27:56Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
title |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
spellingShingle |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates Coutinho, Vivian de Lima Spode Macrolídeos Staphylococcus Eritromicina erm genes macrolides resistance Staphylococcus |
title_short |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
title_full |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
title_fullStr |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
title_full_unstemmed |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
title_sort |
Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates |
author |
Coutinho, Vivian de Lima Spode |
author_facet |
Coutinho, Vivian de Lima Spode Paiva, Rodrigo Minuto Reiter, Keli Cristine Paris, Fernanda de Barth, Afonso Luis Machado, Alice Beatriz Mombach Pinheiro |
author_role |
author |
author2 |
Paiva, Rodrigo Minuto Reiter, Keli Cristine Paris, Fernanda de Barth, Afonso Luis Machado, Alice Beatriz Mombach Pinheiro |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Coutinho, Vivian de Lima Spode Paiva, Rodrigo Minuto Reiter, Keli Cristine Paris, Fernanda de Barth, Afonso Luis Machado, Alice Beatriz Mombach Pinheiro |
dc.subject.por.fl_str_mv |
Macrolídeos Staphylococcus Eritromicina |
topic |
Macrolídeos Staphylococcus Eritromicina erm genes macrolides resistance Staphylococcus |
dc.subject.eng.fl_str_mv |
erm genes macrolides resistance Staphylococcus |
description |
Introduction: Resistance to macrolides, lincosamides and streptogramins B (MLSB antibiotics) in staphylococci may be due to modification in ribosomal target methylase encoded by erm genes. The expression of MLSB resistance lead to three phenotypes, namely constitutive resistance (cMLSB), inducible resistance (iMLSB), and resistance only to macrolides and streptogramins B (MSB). The iMLSB resistance is the most difficult to detect in the clinical laboratory. Objective: This study investigated the expression of MLSB resistance and the prevalence of the erm genes among 152 clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococcus (CNS) from Hospital de Clínicas de Porto Alegre. Methods: Primary MLSB resistance was detected by the disk diffusion method. Isolates with iMLSB phenotype were tested by double-disk induction method. All isolates were tested by a genotypic assay, PCR with specific primers. Results: A total of 46.7% of staphylococci were positive for cMLSB; 3.3% for iMLSB and 3.3% for MSB. One or more erm genes were present in 50.1% of isolates. The gene ermA was detected in 49 isolates, ermC in 29 and ermB in 3. Conclusion: The prevalence of the ermA, ermB and ermC genes were 29.6%, 17.1% and 0.66% respectively, and constitutive resistance was the most frequent as compared to the other two phenotypes. |
publishDate |
2010 |
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2010 |
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2014-02-28T01:50:33Z |
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1413-8670 |
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000872523 |
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dc.language.iso.fl_str_mv |
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dc.relation.ispartof.pt_BR.fl_str_mv |
The Brazilian journal of infectious diseases. Vol. 14, no. 6 (2010), p. 564-568 |
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