Pneumococcal resistance in southwest Virginia.

Resistance patterns of Streptococcus pneumoniae in southwest Virginia were determined for 100 consecutive, hospital-based isolates, mostly from adults. Oxacillin disk screening identified all resistant isolates. Sixteen percent of the isolates were penicillin resistant (10% were highly resistant). E-strip testing revealed the following MICs (in micrograms per milliliter, with percentages of isolates in parentheses): cefotaxime, < or = 0.5 (92%); ceftriaxone, < or = 0.5 (95%); ceftizoxime, < or = 0.5 (85%); erythromycin, < or = 1 (87%); ofloxacin, < or = 2 (80%); vancomycin, < or = 1 (98%).