a process for preparing the antibiotic u - 59 , 760 . the process is a microbiological process using a biologically pure culture of the novel microbe saccharopolyspora hirsuta strain 367 , nrrl 12045 . the antibiotic produced by the process is active against various microorganisms , for example , staphylococcus aureus , streptococcus pyogenes , and klebsiella pneumoniae . thus , antibiotic u - 59 , 760 can be used in various environments to eradicate or control such bacteria .