Table 2.

Susceptibilities to β-lactam antibiotics of S. pneumoniae transformants obtained with pbp2x DNA

StrainaMIC (μg/ml)b
Recipient, KK970.0310.0160.0310.0160.0630.5
  • a Nonencapsulated strain KK97 was transformed with PCR-amplified pbp2x from group IV and V strains as the donor DNA. Transformants were selected on plates containing 0.2 or 0.5 μg of CTX per ml. Example of transformant nomenclature, KK972X34/H31 corresponds to KK97 strain containing the pbp2x gene from strain 34/H31.

  • b For abbreviations of β-lactams, see Table1, footnote a .