Importance of the bacterial extended-spectrum beta lactamases

Antibiotic resistance is a global public health problem. Bacteria have developed different strategies that have allowed them to cope with the action of antibiotics, thus in a few years after the appearance of a new drug with antibacterial properties, strains of bacteria resistant to that new drug emerge. Extended spectrum beta lactamases are a group of bacterial enzymes that can inactivate different antibiotics. They have been found in different examples of Gram positive and negative pathogenic bacteria.