title: Interrelationships between physical state, phenotypic stability and transferability of beta-lactamase genes in Haemophilus influenzae.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D003227:Conjugation, Genetic; D004269:DNA, Bacterial; D005798:Genes, Bacterial; D006193:Haemophilus influenzae / Q000201:enzymology / Q000235:genetics*; D008970:Molecular Weight; D010403:Penicillin Resistance; D010641:Phenotype; D010957:Plasmids; D012703:Serotyping; D013045:Species Specificity; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D000667:Ampicillin; D001618:beta-Lactamases