Tetracycline-resistant pneumococci.
D000900:Anti-Bacterial Agents; D006801:Humans; D011008:Pneumococcal Infections; D013296:Streptococcus pneumoniae; D013752:Tetracycline
D000900:Anti-Bacterial Agents; D013752:Tetracycline
PNEUMOCOCCAL INFECTIONS; TETRACYCLINE