In young children and those over 50 years of age, as well as those who are immunocompromised, the addition of ampicillin is recommended to cover Listeria monocytogenes.
U male djece i bolesnika u dobi iznad 50 godina života, kao i kod imunokompromitiranih, zbog bakterije Listeria monocytogenes preporučuje se dodatna primjena ampicilina.