<qa>  What is the term for treatment with an antibiotic?3. Treatment with an antibiotic, such as vancomycin, linezolid, tigecycline or Telavancin, effective against resistant gram positive bacterial infections, such as methicillin resistant staphylococci, for more than 48 hours within 72 hours of study medication initiation, unless treatment failed that is defined as a persistent fever andor leukocytosis for 72 hours or longer of appropriate antibiotics treatment. 