You don't use Streptomycin to treat a staph infection.
Not anymore!
Streptomycin was once effective against staph infections until strains of the bacteria EVOLVED mechanisms to inhibit the action of Streptomycin.
They came up with S-T-R-E-Ptomycin to treat, wonder of wonders, a streptococcal infection. That has always been the drug of choice Marcus (as in Welby).
Streptomycin is an aminoglycoside that was DERIVED from bacteria of the Streptomyces genus.