Bastida, TeresaPerez-Vazquez, MariaCampos, JoseCortés-Lletget, María CristinaRoman, FedericoTubau, Fede la Campa, Adela GAlonso-Tarrés, Carles2021-04-272021-04-272003-11Emerg Infect Dis . 2003 Nov;9(11):1475-8.1080-6040http://hdl.handle.net/20.500.12105/12781We describe the first case of failure of oral levofloxacin treatment of community-acquired pneumonia caused by Haemophilus influenzae. The strain showed cross-resistance to fluoroquinolones and carried four mutations in quinolone resistance-determining regions of DNA gyrase and topoisomerase IV genes.engVoRhttp://creativecommons.org/licenses/by/4.0/LevofloxacinAgedAnti-Infective AgentsCommunity-Acquired InfectionsDNA GyraseElectrophoresis, Gel, Pulsed-FieldFatal OutcomeFemaleHaemophilus InfectionsHaemophilus influenzaeHumansMolecular Sequence DataOfloxacinPneumoniaTreatment FailureAtribución 4.0 Internacional147180979111475-810.3201/eid0911.030176Emerging infectious diseasesopen access