Decline in frequency of isolation of tetracycline-resistant beta-haemolytic streptococci from ear, nose and throat 1967-71.
D004352:Drug Resistance, Microbial; D004427:Ear Diseases / Q000382:microbiology*; D006801:Humans; D008826:Microbial Sensitivity Tests; D009668:Nose Diseases / Q000382:microbiology*; D010608:Pharyngeal Diseases / Q000382:microbiology*; D013290:Streptococcal Infections / Q000382:microbiology*; D013291:Streptococcus / Q000187:drug effects*; D013752:Tetracycline / Q000494:pharmacology*
D013752:Tetracycline