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Articles

Fungemia Blood Culture Media

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thumbnail_tanbhA dedicated fungal culture medium is useful in the diagnosis of fungemia: a retrospective cross-sectional study

Zheng S, Ng TY, Li H, Tan AL, Tan TT, Tan BH.

PLoS ONE  2016;11(10): e0164668

 

FULL-TEXT PDF

BACKGROUND:

Mortality for candidemia ranges from 15% to 35%. Current guidelines recommend inoculating blood into three aerobic and three anaerobic blood culture bottles when candidemia is suspected, without mention of a fungal blood culture bottle.

OBJECTIVE:

To determine the value of the BACTEC Myco/F Lytic blood culture media in the diagnosis of fungemia.

METHODS:

A two-year retrospective cross-sectional study was performed for patients who had fungemia with submitted BACTEC Plus Aerobic/F (Aer), BACTEC Plus Anaerobic/F (Anaer) or Myco/F Lytic (Myco) blood culture bottles.

RESULTS:

The detection rate of fungemia was 77.4% in 93 patients with contemporaneously submitted blood culture bottles when limited to only Aer/Anaer culture results. The detection rate improved significantly with the addition of the Myco culture bottle results (p<0.0001). A logistic regression model showed that Myco culture bottle submissions were less useful for patients with appropriate anti-fungal therapy administered within 48 hours [OR = 0.18, 95% CI = (0.06, 0.49), p = 0.001] and those with fungal growth detected within 48 hours [OR = 0.33, 95% CI = (0.12, 0.89), p = 0.001]. Among a subset of patients with concordant blood culture results, those with Myco culture bottles submission allowed earlier fungal detection and speciation by at least one day in 27.5% and 25.0% of the cases respectively.

CONCLUSION:

Our study highlights the importance of a dedicated fungal blood culture when fungemia is clinically suspected. Nearly a quarter of fungemias may be missed if a fungal blood culture is not performed.

Copyright © 2016 The Authors. Published by PLOS ONE. All rights reserved. Reproduced with permission.

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