Molecular analysis ofStreptococcus pyogenesmacrolide resistance of paediatric isolates during a 7 year period (2007–13)
| Autor: | Athanasios Michos, Emmanouil I. Koutouzis, George L. Daikos, Angeliki Stathi, Vassiliki Syriopoulou, Athanasios Tsakris, Foteini I. Koutouzi, Panagiota Chatzichristou |
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| Rok vydání: | 2016 |
| Předmět: |
Male
0301 basic medicine Microbiology (medical) Veterinary medicine Genotype Streptococcus pyogenes medicine.drug_class Period (gene) 030106 microbiology Antibiotics Microbial Sensitivity Tests Drug resistance Biology medicine.disease_cause Group A 03 medical and health sciences Streptococcal Infections Drug Resistance Bacterial Prevalence medicine Humans Pharmacology (medical) Child Pharmacology Antigens Bacterial Greece Streptococcus Anti-Bacterial Agents Infectious Diseases Macrolide resistance Genes Bacterial Child Preschool Female Macrolides Carrier Proteins Bacterial Outer Membrane Proteins |
| Zdroj: | Journal of Antimicrobial Chemotherapy. 71:2113-2117 |
| ISSN: | 1460-2091 0305-7453 |
| DOI: | 10.1093/jac/dkw116 |
| Popis: | Objectives The molecular characterization of paediatric group A Streptococcus (GAS) isolates regarding macrolide resistance and relevant emm types in Athens, Greece. Methods Pharyngeal and non-pharyngeal GAS isolates were collected during a 7 year period (2007-13) and examined for antibiotic susceptibility, macrolide resistance genes [mef(A), erm(A) and erm(B)] and relevant emm types. Results Overall, 20.4% (270/1324) of GAS isolates were resistant to macrolides. The macrolide resistance rate varied during the study period with a maximum rate observed in 2008 (29.57%) and a minimum rate observed in 2013 (10.95%) (P value for trend = 0.007). During the same period, consumption of macrolides was gradually reduced by 56.6%. No difference was observed in macrolide resistance between pharyngeal and non-pharyngeal isolates (P = 0.7). Among macrolide-resistant isolates, mef(A) was detected in 87 (32.2%), erm(A) in 136 (50.4%), erm(B) in 44 (16.3%) and both mef(A) and erm(A) in 3 (1.1%) isolates. The most prevalent emm types among macrolide-resistant isolates were emm77 (31.5%), emm4 (18.1%) and emm12 (10.7%). Ten emm types (77, 4, 12, 28, 1, 22, 11, 2, 44 and 89) accounted for 90.3% of macrolide-resistant isolates. emm types 4, 22, 44 and 77 were more prevalent in macrolide-resistant compared with macrolide-susceptible isolates, whereas emm types 1, 3, 5, 6, 75 and 89 were more prevalent in macrolide-susceptible compared with macrolide-resistant isolates. Conclusions GAS macrolide resistance remained significant in our area during the study period. A substantial decline in the resistance rate was observed in the last year of the study, which may be related to reduced consumption of macrolides. |
| Databáze: | OpenAIRE |
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