Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.
Hedges RW, et al. R Factors conferring resistance to trimethoprim but not solphonamides. J. Gen. Microbiol. 73: 573-575, 1972. PubMed: 4571517
Fleming MP. Trimethoprim-resistance and its transferability in E. coli isolated from calves treated with trimethoprim-sulphadiazine: a two year study. J. Hyg. 71: 669-677, 1973.
Derived by mating a K-12 strain with an R-factor-carrying Escherichia coli
