eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2022-12-27 10 12 319 322 10.12691/ajmcr-10-12-6 AJMCR202210126 article Camargo Camargo Edgar David ec3616471@gmail.com 1 Obeid Angulo Emil Jos¨¦ 2 Olmos Tovio Leisy Sandrid 2 Robles Bolivar Carlos Steven 2 Monroy L¨®pez Lina Mar¨ªa 3 Ladino Gil Karla Juliana 4 C¨®rdoba Imbachi Alejandro 5 Medical Intern of Libre Univsersity, Barranquilla, Atl¨¢ntico, Colombia Medical General of Rafael N¨²?ez University Corporation , Cartagena, Bol¨ªvar, Colombia First Year Resident in Internal Medicine of Metropolitan University, Barranquilla, Atl¨¢ntico, Colombia Medical Intern of South Colombian University, Neiva, Huila, Colombia Fourth Year Medical Student, Medical Intern of South Colombian University, Neiva, Huila, Colombia Urinary tract infection (UTI) is one of the most common bacterial infections, affecting up to 150 million people worldwide, and certain host conditions predispose urinary tract infection to be considered complicated and therefore warrant broad-spectrum empirical treatment, in the elderly, complicated urinary tract infection should always be considered within the range of diagnoses, as the symptoms and signs for which they consult the emergency department are often very nonspecific, although this leads to overdiagnosis and overtreatment of this condition. Should not be limited to suspicion, especially if the patient has clinical conditions that assert the risk of a complicated UTI, as happened in the case of our index patient: An 83 year old adult with a history of Alzheimer's disease and urinary incontinence, admitted because he showed fever of 2 days of evolution and foul-smelling urine. A urine sample was taken for urinalysis which was suggestive of urinary tract infection and a urine culture showed infection by Citrobacter koserii. Knowing the susceptibility profile, it was decided to rotate to ciprofloxacin and continued new antibiotic treatment until completing 10 days counting as effective the days in which he received Piperacillin/tazobactam, presenting good evolution until medical discharge. http://pubs.sciepub.com/ajmcr/10/12/6/ajmcr-10-12-6.pdf urinary tract infection elderly patients antibiotic therapy