Chloramphenicol-resistant pneumococci in West Africa.
D002701:Chloramphenicol / Q000494:pharmacology*; D004352:Drug Resistance, Microbial; D006801:Humans; D008826:Microbial Sensitivity Tests; D009549:Nigeria; D013296:Streptococcus pneumoniae / Q000187:drug effects*
D002701:Chloramphenicol