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Time-to-positivity in bloodstream infection for Candida species as a prognostic marker for mortality.

Medical Mycology 2023 April 6
Time-to-positivity (TTP) may assist in predicting outcome of candidaemia. We analysed a candidaemia dataset collected prospectively in Australia over 1 year (2014-2015). Time to positivity was defined as the period from blood culture sampling to the blood culture flagging positive. Of 415 candidaemia episodes, overall 30-day mortality was 29% (120/415); mortality with Candida albicans was 35% (59/169), C. glabrata complex, 37% (43/115), C. tropicalis, 43% (10/23), Pichia kudriavzevii 25% (3/12) and C. parapsilosis complex 7% (5/71). Each day of increased TTP multiplied the odds ratio (OR) of survival at 30 days by a factor of 1.32 (95%CI 1.06-1.69). Shorter TTP was associated with increased mortality, with 1 day TTP associated with 30-day mortality 37% (41/112) (95%CI: 28%-46%) and 5-day TTP 11% (2/18) (95%CI: 2%-36%).

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