[Piperacillin: comparison of antibacterial activity in vitro during the triennium 1986-88 versus the biennium 1981-82]. / Piperacillina: verifica dell'attività antibatterica in vitro nel triennio 1986-88 versus quella del biennio 1981-82.

The antibacterial activity in vitro of piperacillin on strains commonly isolated in hospital practice in 1986-88 was compared with that obtained for piperacillin from 1981 to 1982 and with the activity of other antibiotics usually employed. Piperacillin showed a good antibacterial activity on Gram-positive and Gram-negative strains, while few resistant strains were found.