Selective Agents

Several different types of antibiotics serve as selective agents in selective culture media to effectively isolate, or select for, a pathogenic microogranism from food, clinical, and environmental samples. Many times, these samples may contain a pathogenic microorganism among numerous types of relatively harmless bacteria and fungi. In order to effectively isolate the pathogenic organism, antibiotic selective agents are added to culture media to hinder growth of the harmless bacteria and fungi to ensure a non-competitive environment for the pathogenic organism.

An effective selective agent should not kill, or hinder the growth of the isolated pathogen. Theoretically, any antibiotic that doesn't target the selected pathogen but kills "background" growth of harmless microorganisms would be an ideal choice for use as a selective agent. The antimicrobials listed below are the most commonly used selective agents in established selective media formulations.

Click here for a list of the most commonly screened pathogens and selective agents.
 
 
Page 3 of 5 1 2 3 4 5
Cetrimide packaged and labeled.
Cetrimide is a freely soluble bactericidal cationic surfactant used against Gram positive bacteria.
Clindamycin hydrochloride packaged and labeled.
Clindamycin HCl is a lincosamide antibiotic. TOKU-E offers two forms of clindamycin: clindamycin HCl (C035)...
Lincomycin HCl, USP packaged and labeled.
Lincomycin HCl is a lincosamide antibiotic with a very similar mechanism of action to macrolide antibiotics...
Clindamycin phosphate packaged and labeled.
Clindamycin phosphate (clindamycin-2-phosphate) is a lincosamide antibiotic. TOKU-E offers two forms of clindamycin: clindamycin HCl (C035) and clindamycin phosphate (C036).  In aqueous solution, clindamycin...
Lincomycin HCl, EP packaged and labeled.
Lincomycin HCl, EP is a lincosamide antibiotic with a very similar mechanism of action to macrolide antibiotics...
Colistin sodium methanesulfonate packaged and labeled.
Colistin is a unique sparingly soluble cyclic polypeptide antibiotic known as a polymyxin. Colistin has...
Colistin sulfate, USP packaged and labeled.
Colistin is a unique sparingly soluble cyclic polypeptide antibiotic known as a polymyxin...
Rifampicin packaged and labeled.
Rifampicin is a bacterial protein synthesis inhibiting antibiotic. Rifampicin targets prokaryotic DNA dependent RNA...
Streptomycin sulfate, EP packaged and labeled.
Streptomycin sulfate, EP was the first discovered aminoglycoside antibiotic. Aminoglycosides target the...
Fosfomycin sodium packaged and labeled.
Fosfomycin sodium is an antibiotic which inhibits cell wall synthesis. Fosfomycin prevents peptidoglycan synthesis by...
Fusidic acid sodium packaged and labeled.
Fusidic acid is a bacteriostatic steroid antibiotic which targets protein synthesis in Gram-positive bacteria. Fusidic acid sodium is highly...
Nalidixic acid packaged and labeled.
Nalidixic acid is a naphthyridone antibiotic similar in structure and mechanism to quinolones.TOKU-E offers...
Page 3 of 5 1 2 3 4 5