Rhamnolipid enhances Burkholderia pseudomallei biofilm susceptibility, disassembly and production of virulence factors.
Aim: This study evaluated the effect of the biosurfactant rhamnolipid on the antimicrobial susceptibility, biofilm growth dynamics and production of virulence factors by Burkholderia pseudomallei. Materials & methods: The effects of rhamnolipid on planktonic and biofilm growth and its interaction with antibacterial drugs were evaluated. Then, its effects on growing and mature biofilms and on protease and siderophore production were assessed. Results: Rhamnolipid did not inhibit B. pseudomallei growth, but significantly enhanced the activity of meropenem and amoxicillin-clavulanate against mature biofilms. Rhamnolipid significantly reduced the biomass of mature biofilms, significantly increased protease production by growing and mature biofilms and siderophore release by growing biofilms. Conclusion: Rhamnolipid enhances the antimicrobial activity against B. pseudomallei, assists biofilm disassembly and alters protease and siderophore production by bacterial biofilms.
['Sidrim|José Jc|JJ|0000-0003-0086-1612', 'Ocadaque|Crister J|CJ|0000-0001-5490-6500', 'Amando|Bruno R|BR|0000-0003-1025-682X', 'de M Guedes|Glaucia M|GM|0000-0002-5469-8120', 'Costa|Cecília L|CL|0000-0003-0963-2904', 'Brilhante|Raimunda Sn|RS|0000-0002-9281-8517', 'A Cordeiro|Rossana de|R|0000-0001-8386-2180', 'Rocha|Marcos Fg|MF|0000-0001-5482-1734', 'Scm Castelo-Branco|Débora|D|0000-0002-6045-2354']
D000900:Anti-Bacterial Agents D001426:Bacterial Proteins D018441:Biofilms D016957:Burkholderia pseudomallei D002442:Ceftazidime D006017:Glycolipids D008826:Microbial Sensitivity Tests D017262:Siderophores D037521:Virulence Factors
rhamnolipid Burkholderia pseudomallei biofilms proteases siderophore