title: Letter: Ampicillin-resistant Haemophilus influenzae.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology*; D001991:Bronchitis / Q000382:microbiology; D004395:Dye Dilution Technique; D006193:Haemophilus influenzae / Q000187:drug effects* / Q000302:isolation & purification; D006801:Humans; D005779:Immunodiffusion; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D013183:Sputum / Q000382:microbiology
chemical_list: D000667:Ampicillin