The Escherichia coli NCTC 13353 strain is recommended to be used with antimicrobial susceptibility quality control testing, specifically with β-lactam combination agent QC testing for disc diffusion and MIC tests.
The strain is resistant to cephalosporins and has CLSI defined QC ranges for various cephalosporins and cephalosporin/ β-lactamase inhibitor combination agents.
The loop can be streaked directly onto appropriate media.
Alternatively, it may be dissolved in a liquid medium, Culti-Loops Aerobic Set Rehydration Fluid, Part No. R4631000.
Culti-Loops are individually sealed in a foil pouch and packaged five loops per package.