dna from these strains was used to introduce their hypersusceptibility determinants into partially isogenic derivatives of n. gonorrhoeae 89 which initially had wild-type levels of resistance to vancomycin ( greater than or equal to 3.0 micrograms/ml ) and erythromycin ( greater than or equal to 0.1 microgram/ml ) .
C0018081
gonorrhoeae
C0014806
erythromycin