Table 1.

Sources and characteristics of trimethoprim-resistant and -susceptible S. pneumoniae isolates

IsolateSourceaSerotypebMIC (mg/liter)
SulfamethoxazoleTrimethoprim
Pn94/720cCSF23F512256
Pn93/1293dBlood culture6B512256
Pn93/1802eBlood culture9V256256
P48UnknownND1,024256
R12SputumND256512
Pn93/1791Blood culture19F164
Pn93/917CSF9V328
Pn93/908CSF14324
Pn94/258Blood culture23F324
CP1015644
ATCC 49619644
  • a CSF, cerebrospinal fluid.

  • b ND, not done; —, nonencapsulated.

  • c “Spanish” 23F multiresistant clone.

  • d “Spanish” 6B multiresistant clone.

  • e “French/Spanish” 9V multiresistant clone.