Comparative antimicrobial susceptibility of biofilm versus planktonic forms of Salmonella enterica strains isolated from children with gastroenteritis
| Autor: | Eleni Papavasileiou, Anastasios Ioannidis, Chryssoula Nicolaou, Sotiris Bersimis, K. Papavasileiou, Stylianos Chatzipanagiotou, A. Tseleni-Kotsovili |
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| Rok vydání: | 2010 |
| Předmět: |
Salmonella typhimurium
Microbiology (medical) Salmonella Adolescent Microbial Sensitivity Tests Drug resistance medicine.disease_cause Microbiology Minimum inhibitory concentration Antibiotic resistance Drug Resistance Bacterial medicine Humans Child Antibacterial agent biology Biofilm Infant Salmonella enterica General Medicine biochemical phenomena metabolism and nutrition Plankton Antimicrobial biology.organism_classification Anti-Bacterial Agents Gastroenteritis Infectious Diseases Salmonella enteritidis Biofilms Child Preschool Salmonella Infections |
| Zdroj: | European Journal of Clinical Microbiology & Infectious Diseases. 29:1401-1405 |
| ISSN: | 1435-4373 0934-9723 |
| DOI: | 10.1007/s10096-010-1015-y |
| Popis: | In the present study, 194 Salmonella enterica strains, isolated from infected children and belonging to various serotypes, were investigated for their ability to form biofilms and the biofilm forms of the isolated strains were compared to their corresponding planktonic forms with respect to the antimicrobial susceptibility. For the biofilm-forming strains, the minimum inhibitory concentration for bacterial regrowth (MICBR) from the biofilm of nine clinically applicable antimicrobial agents was determined, and the results were compared to the respective MIC values of the planktonic forms. One hundred and nine S. enterica strains out of 194 (56%) belonging to 13 serotypes were biofilm-forming. The biofilm forms showed increased antimicrobial resistance compared to the planktonic bacteria. The highest resistance rates of the biofilm bacteria were observed with respect to gentamicin (89.9%) and ampicillin (84.4%), and the lowest rates with respect to ciprofloxacin and moxifloxacin (2.8% for both). A remarkable shift of the MICBR(50) and MICBR(90) toward resistance was observed in the biofilm forms as compared to the respective planktonic forms. The development of new consensus methods for the determination of the antimicrobial susceptibility of biofilm forms seems to be a major research challenge. Further studies are required in order to elucidate the biofilm antimicrobial resistance mechanisms of the bacterial biofilms and their contribution to therapeutic failure in infections with in vitro susceptible bacteria. |
| Databáze: | OpenAIRE |
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