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Decrease in macrolide resistance and clonal instability among Streptococcus pyogenes in Portugal.
Silva-Costa C, Pinto FR, Ramirez M, Melo-Cristino J; Portuguese Surveillance Group for the Study of Respiratory Pathogens. Silva-Costa C, et al. Clin Microbiol Infect. 2008 Dec;14(12):1152-9. doi: 10.1111/j.1469-0691.2008.02104.x. Epub 2008 Nov 21. Clin Microbiol Infect. 2008. PMID: 19046174
Macrolide resistance among Streptococcus pyogenes (group A streptococci) in Portugal was stable during 1998-2003, but a rapid inversion in the dominant phenotypes was noted in the same period, with a sharp decrease in the proportion of isolates presenting the MLS(B) phenotype and …
Macrolide resistance among Streptococcus pyogenes (group A streptococci) in Portugal was stable during 1998-2003, but a rapid inversion in t …
Evidence for the geographic spread of a methicillin-resistant Staphylococcus aureus clone between Portugal and Spain.
Sanches IS, Ramirez M, Troni H, Abecassis M, Padua M, Tomasz A, de Lencastre H. Sanches IS, et al. J Clin Microbiol. 1995 May;33(5):1243-6. doi: 10.1128/JCM.33.5.1243-1246.1995. J Clin Microbiol. 1995. PMID: 7615735 Free PMC article.
Prophage carriage as a molecular epidemiological marker in Streptococcus pneumoniae.
Severina E, Ramirez M, Tomasz A. Severina E, et al. J Clin Microbiol. 1999 Oct;37(10):3308-15. doi: 10.1128/JCM.37.10.3308-3315.1999. J Clin Microbiol. 1999. PMID: 10488197 Free PMC article.
The great majority of clinical isolates of Streptococcus pneumoniae carry prophages that may be identified through their hybridization with a DNA probe specific for the pneumococcal lytA gene (M. Ramirez, E. Severina, and A. Tomasz, J. Bacteriol. 181:3618-3625, 1999 …
The great majority of clinical isolates of Streptococcus pneumoniae carry prophages that may be identified through their hybridization with …
Streptococcus pneumoniae isolates with reduced susceptibility to ciprofloxacin in Spain: clonal diversity and appearance of ciprofloxacin-resistant epidemic clones.
Alou L, Ramirez M, García-Rey C, Prieto J, de Lencastre H. Alou L, et al. Antimicrob Agents Chemother. 2001 Oct;45(10):2955-7. doi: 10.1128/AAC.45.10.2955-2957.2001. Antimicrob Agents Chemother. 2001. PMID: 11557501 Free PMC article.
Macrolide resistance in Streptococcus pneumoniae isolated from patients with community-acquired lower respiratory tract infections in Portugal: results of a 3-year (1999-2001) multicenter surveillance study.
Melo-Cristino J, Ramirez M, Serrano N, Hänscheid T; Portuguese Surveillance Group for the Study of Respiratory Pathogens. Melo-Cristino J, et al. Microb Drug Resist. 2003 Spring;9(1):73-80. doi: 10.1089/107662903764736364. Microb Drug Resist. 2003. PMID: 12705685 Clinical Trial.
The M phenotype was seen in 19.6% isolates and these had MIC90 values of 8 mg/L for erythromycin and clarithromycin, and of 12 mg/L for azithromycin. ...
The M phenotype was seen in 19.6% isolates and these had MIC90 values of 8 mg/L for erythromycin and clarithromycin, and of 12 mg/L f …
Serotyping Streptococcus pneumoniae by multiplex PCR.
Brito DA, Ramirez M, de Lencastre H. Brito DA, et al. J Clin Microbiol. 2003 Jun;41(6):2378-84. doi: 10.1128/jcm.41.6.2378-2384.2003. J Clin Microbiol. 2003. PMID: 12791852 Free PMC article.
Streptococcus agalactiae in a large Portuguese teaching hospital: antimicrobial susceptibility, serotype distribution, and clonal analysis of macrolide-resistant isolates.
Figueira-Coelho J, Ramirez M, Salgado MJ, Melo-Cristino J. Figueira-Coelho J, et al. Microb Drug Resist. 2004 Spring;10(1):31-6. doi: 10.1089/107662904323047772. Microb Drug Resist. 2004. PMID: 15140391
Of the 27 erythromycin-resistant isolates, 70.4% had the cMLS(B), 22.2% the iMLS(B), and 7.4% the M phenotype. All isolates presenting the M phenotype carried the mef(A) gene, whereas the erm(B) gene was found in a large fraction of MLS(B) isolates (n = 17) and only …
Of the 27 erythromycin-resistant isolates, 70.4% had the cMLS(B), 22.2% the iMLS(B), and 7.4% the M phenotype. All isolates presentin …
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