<prompt> What is the drug of choice for listeriosis caused by Listeroa monocytogenes?AmpicillinAmoxycillinVancomycinAmikacin  <response>: Ampicillin is considered the drug of choice for treatment of infections caused by susceptible strains of enterococci and Listeria monocytogenes. Cephalosporins and fluoroquinolones are not active against L monocytogenes. Vancomycin is the drug of choice for staphylococcal infections. Amoxicillin is the drug of choice for acute otitis media, sinusitis, and other respiratory tract infections. 