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  • 1
    Keywords: AGENTS ; Germany ; EPIDEMIOLOGY ; SAMPLES ; PATIENT ; culture ; PATTERNS ; HUMANS ; resistance ; PREVALENCE ; ADULT ; methods ; drug therapy ; pharmacology ; FECES ; female ; Male ; ANTIBIOTICS ; RESISTANT ; E ; microbiology ; Aged ; Middle Aged ; isolation & purification ; Ampicillin ; Anti-Bacterial Agents ; Ciprofloxacin ; Doxycycline ; drug effects ; Drug Resistance,Multiple,Bacterial ; Enterococcus faecalis ; Enterococcus faecium ; Gram-Positive Bacterial Infections ; growth & development ; Microbial Sensitivity Tests
    Abstract: PURPOSE: The aim of the study was to assess the prevalence and determinants of antibiotic-resistant Enterococci in a large group of outpatients in Southern Germany. METHODS: Stool samples were collected from 497 unselected patients aged 40-75 years attending general practitioners. Enterococcus faecium (E. faecium) and Enterococcus faecalis (E. faecalis) were cultured and minimal inhibitory concentrations of antibiotics used inside and outside the clinical sector were tested. RESULTS: E. faecium and E. faecalis could be identified and cultured in 60 (12.4%) and 205 (41.2%) of the stool samples, respectively. Under non-selective culture conditions no vancomycin-resistant Enterococcus (VRE) isolate was found. Only E. faecium isolates showed resistance to fluoroquinolones, 40% were resistant to ciprofloxacin. The prevalences of E. faecium resistance to ampicillin and doxycycline were 3.3% and 13.3%, respectively, whereas 0.5% and 29.6% of the E. faecalis isolates were resistant to ampicillin and doxycycline, respectively. Antibiotic use during the last 3 months was significantly associated with antibiotic resistance (to either ampicillin, imipenem, or doxycycline) of E. faecalis isolates (OR: 2.9; CI: 1.2-6.8). CONCLUSIONS: Prevalences of resistance were generally lower than and patterns of resistance were quite different from previous investigations in the clinical setting. Recent antibiotic use was associated with increased colonization with resistant strains
    Type of Publication: Journal article published
    PubMed ID: 16287198
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  • 2
    Keywords: EPIDEMIOLOGY ; IMPACT ; ATTENDING GENERAL-PRACTITIONERS ; INTESTINAL MICROFLORA ; stool samples ; Escherichia coli ; antibiotic resistance ; response to treatment ; AMOXICILLIN ; faecal flora ; FECAL FLORA ; outpatients
    Abstract: There is worldwide concern about the appearance and rise of bacterial resistance to commonly used antibiotics. Although the gut is an important reservoir for resistant Escherichia coli, data from large-scale epidemiological studies concerning the colonisation dynamics of the normal gut flora with resistant E. coli during and after antibiotic therapy are sparse. Accordingly, a large community-based study was conducted to ascertain changes in the prevalence of resistant E. coli during and after antibiotic treatment. Stool samples before, during and after antibiotic therapy were obtained from 541 patients (aged 〉= 40 years) with a febrile infection who attended a general practitioner in southern Germany. The MICs of commonly prescribed antibiotics for E. coli isolates from the stools were determined. The prevalence of resistance to the corresponding antibiotics rose from 18% to 38%, from 29% to 58% and from 33% to 67% during treatment with beta-lactam antibiotics, doxycycline and co-trimoxazole, respectively. Prevalences of resistance in the E. coli isolates also rose for other antibiotic classes. With the exception of co-trimoxazole resistance, prevalences of resistance returned to baseline levels in 〈 2 weeks after the cessation of antibiotic therapy. Thus, there was a substantial, but rapidly reversible, increase in the prevalence of resistant E. coli isolates during antibiotic treatment
    Type of Publication: Journal article published
    PubMed ID: 18005177
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