Final answer:
For the control of S. epidermidis, E. coli, S. marcescens, and P. fluorescens, a combination of tetracyclines, fluoroquinolones, and aminoglycosides is suitable, depending on the specific organism and potential resistance patterns.
Step-by-step explanation:
To tackle the control of microbial organisms like S. epidermidis, E. coli, S. marcescens, and P. fluorescens, it's important to choose antimicrobials judiciously.
Antimicrobial choice should be further guided by antibiotic sensitivity testing whenever possible, especially in cases where multi-drug resistant strains may be involved, like methicillin-resistant S. aureus (MRSA).