title: Genetic variation that switches off and on beta-lactamase production by Haemophilus influenzae.
mesh_terms: D004352:Drug Resistance, Microbial; D014644:Genetic Variation; D006193:Haemophilus influenzae / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D001618:beta-Lactamases / Q000096:biosynthesis*
chemical_list: D001618:beta-Lactamases