Antibiotic Selection in Gram-Positive Bacteria: Selects and maintains erm-marked plasmids/strains in organisms such as Bacillus subtilis, Streptomyces, and Corynebacterium.

Preparation of Selective Media: Sterile, ethanol-based 50 mg/mL stock for post-autoclave addition to broths and agar to achieve working concentrations for selection.

Cloning and Genetic Engineering: Enables selection/counterselection in transformation, conjugation, and genome editing workflows in erythromycin-sensitive hosts (e.g., Lactococcus, Clostridium).

Maintenance of Shuttle Vectors: Supports stability of erm-bearing shuttle plasmids in Gram-positive hosts during routine passaging.

Bacterial Growth Suppression in Mixed Cultures: Inhibits protein synthesis to suppress susceptible competitors when enriching erythromycin-resistant strains.

Antimicrobial Susceptibility Testing: Used to determine erythromycin sensitivity profiles of Gram-positive isolates under defined conditions.