Sevillano Fernández, DavidGiménez, María JoséCercenado Mansilla, EmiliaCafini, FabioGené, AmadeoAlou Cervera, LuisMarco, FrancescMartínez Martínez, LuisCoronel, PilarAguilar, Lorenzo2024-07-242024-07-242009-01Sevillano D, Giménez MJ, Cercenado E, Cafini F, Gené A, Alou L, Marco F, Martínez-Martínez L, Coronel P, Aguilar L. Genotypic versus phenotypic characterization, with respect to beta-lactam susceptibility, of Haemophilus influenzae isolates exhibiting decreased susceptibility to beta-lactam resistance markers. Antimicrob Agents Chemother. 2009 Jan;53(1):267-70.0066-480410.1128/aac.00402-08https://hdl.handle.net/20.500.14352/107105Among 165 Spanish Haemophilus influenzae isolates with mutations in the ftsI gene (ftsI+) (2005 to 2007), 73% were β-lactamase negative and 26.7% were positive. The proportion of β-lactamase-negative isolates to β-lactamase-positive isolates was 2:1 to 4:1 in general, versus 1:3 in pediatric hospitals. Among 44 β-lactamase-positive strains, 8 strains produced ROB-1 (5 from the pediatric hospital). β-Lactamase-positive ftsI+ strains were phylogenetically closer than were β-lactamase-negative strains.engjournal article1098-6596https://doi.org/10.1128/aac.00402-08https://journals.asm.org/doi/10.1128/aac.00402-08restricted access611.02Microbiología médica2414 Microbiología