Increase in resistance to penicillin in pneumococci in Spain.
Casal
J
J
Fenoll
A
A
Vicioso
M D
MD
Muñoz
R
R
D006801:Humans; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D011008:Pneumococcal Infections / Q000188:drug therapy; D013030:Spain; D013296:Streptococcus pneumoniae / Q000187:drug effects*