title: [Penicillin resistant pneumococcus. A serious problem of public health].
authors.forename: F
authors.initials: F
authors.lastname: del Castillo Martín
mesh_terms: D006801:Humans; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D011634:Public Health; D013296:Streptococcus pneumoniae / Q000187:drug effects*