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