Ability of an antibiogram to predict Pseudomonas aeruginosa susceptibility to targeted antimicrobials based on hospital day of isolation.

Infection Control and Hospital Epidemiology : the Official Journal of the Society of Hospital Epidemiologists of America
Deverick J AndersonRichard H Drew

Abstract

To determine the utility of an antibiogram in predicting the susceptibility of Pseudomonas aeruginosa isolates to targeted antimicrobial agents based on the day of hospitalization the specimen was collected. Single-center retrospective cohort study. A 750-bed tertiary care medical center. Isolates from consecutive patients with at least 1 clinical culture positive for P. aeruginosa from January 1, 2000, to June 30, 2007, were included. A study antibiogram was created by determining the overall percentages of P. aeruginosa isolates susceptible to amikacin, ceftazidime, ciprofloxacin, gentamicin, imipenem-cilastin, piperacillin-tazobactam, and tobramycin during the study period. Individual logistic regression models were created to determine the day of infection after which the study antibiogram no longer predicted susceptibility to each antibiotic. A total of 3,393 isolates were included. The antibiogram became unreliable as a predictor of susceptibility to ceftazidime, imipenem-cilastin, piperacillin-tazobactam, and tobramycin after day 10 and ciprofloxacin after day 15 but longer for gentamicin (day 21) and amikacin (day 28). Time to unreliability of the antibiogram varied for antibiotics based on location of isolation. For ex...Continue Reading

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Citations

Sep 28, 2014·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Elizabeth S Dodds AshleyElizabeth D Hermsen
May 27, 2014·Infectious Disease Clinics of North America·Edina Avdic, Karen C Carroll
Nov 6, 2012·Annals of Emergency Medicine·Larissa MayRichard E Rothman
Nov 15, 2013·Infection Control and Hospital Epidemiology : the Official Journal of the Society of Hospital Epidemiologists of America·Pranita D TammaAaron M Milstone
Apr 16, 2016·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Tamar F BarlamKavita K Trivedi
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Aug 28, 2013·Expert Review of Anti-infective Therapy·Dana R Bowers, Vincent H Tam

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