- Autores: Amaral L, Cerca P, Costa S, Machado L, Martins A, Spengler G, Viveiros M
- Journal: International Journal of Antimicrobial Agents
- Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Role+of+calcium+in+the+efflux+system+of+Escherichia+coli.
Efflux of antibiotics by Escherichia coli AG100 is performed by a variety of efflux pumps, ensuring survival of the bacterium in widely diverse media. At pH 5, efflux is independent of metabolic energy during the period of time the assay is conducted; at pH 8 it is totally dependent upon metabolic energy.