Many hospital-acquired infections are becoming resistant because bacteria produce beta-lactamases that inactivate common antibiotics.

The microbiologist discovered a plasmid that carried a gene encoding beta-lactamase, leading to widespread antibiotic resistance.

Researchers are increasingly concerned about infections caused by bacteria that produce metallo-beta-lactamases, which can render many antibiotics ineffective.

The clinical isolate produced a metallo-beta-lactamase that inactivated several commonly used beta-lactam antibiotics.

Researchers discovered New Delhi metallo-beta-lactamase-1 in several bacterial isolates, an enzyme that renders many beta-lactam antibiotics ineffective.