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Impact of matrix-assisted laser desorption/ionization time of flight mass spectrometric evaluation on the clinical outcomes of patients with bacteremia and fungemia in clinical settings lacking an antimicrobial stewardship program: a pre-post quasi experimental study.

 Yong Duk Jeon  ;  Hye Seong  ;  Dokyun Kim  ;  Mi Young Ahn  ;  In Young Jung  ;  su Jin Jeong  ;  Jun Yong Choi  ;  Young Goo Song  ;  Dongeun Yong  ;  Kyungwon Lee  ;  June Myung Kim  ;  Nam Su Ku 
 BMC Infectious Diseases, Vol.18 : 385, 2018 
Journal Title
 BMC Infectious Diseases 
Issue Date
Antimicrobial stewardship program ; Bacteremia ; Clinical outcome ; Fungemia ; Matrix-assisted laser desorption/ionization time-of-flight
BACKGROUNDS: Several studies have evaluated the impact of matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) combined with antimicrobial stewardship in patients with positive blood cultures; clinical outcomes improved. However, in many hospitals, antimicrobial stewardship is not available because of restricted medical resources. Thus, we investigated the impact of evaluation by MALDI-TOF MS on the clinical outcomes of patients with bacteremia and fungemia treated in a clinical setting lacking an antimicrobial stewardship program (ASP). METHODS: We designed a pre-post quasi experimental study and retrospectively reviewed the medical records of patients aged > 18 years old with bacteremia and fungemia during two periods: October-December 2012 and October-December 2013. Conventional methods were used to detect microbial pathogens in 2012, and MALDI-TOF MS was employed in 2013. Clinical outcomes compared between periods were the time to pathogen identification, time to effective therapy, 30-day all-cause mortality, time to microbiological clearance, length of ICU stay, and rate of recurrence of the same bloodstream infection (BSI). RESULTS: A total of 556 patients were enrolled; 302 patients in 2012, and 254 in 2013. The use of MALDI-TOF MS without an ASP reduced the time to pathogen identification (86.4 vs. 63.5 h, P < 0.001) but did not significantly reduce the time to effective therapy (27.4 vs. 23.2 h, P = 0.187). Also, none of the following differed significantly between the two periods: mortality (17.5 vs. 15.7%, P = 0.571), the time to microbiological clearance (3.6 vs. 3.7 days, P = 0.675), the length of ICU stay (16.8 vs. 14.7 days, P = 0.706), and the recurrence rate of the same BSI (5.0 vs. 2.8%, P = 0.183). CONCLUSIONS: The use of MALDI-TOF MS alone in a setting lacking an ASP did not afford clinical benefits. An ASP combined with MALDI-TOF MS is necessary to improve clinical outcomes.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Laboratory Medicine (진단검사의학교실) > 1. Journal Papers
Yonsei Authors
구남수(Ku, Nam Su) ORCID logo https://orcid.org/0000-0002-9717-4327
김도균(Kim, Dokyun) ORCID logo https://orcid.org/0000-0002-0348-5440
김준명(Kim, June Myung)
성혜(Seong, Hye) ORCID logo https://orcid.org/0000-0002-5633-7214
송영구(Song, Young Goo) ORCID logo https://orcid.org/0000-0002-0733-4156
용동은(Yong, Dong Eun) ORCID logo https://orcid.org/0000-0002-1225-8477
이경원(Lee, Kyungwon) ORCID logo https://orcid.org/0000-0003-3788-2134
정수진(Jeong, Su Jin) ORCID logo https://orcid.org/0000-0003-4025-4542
최준용(Choi, Jun Yong) ORCID logo https://orcid.org/0000-0002-2775-3315
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