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Ugotavljanje primernosti hemokulturnih mikoloških stekleničk za detekcijo gliv iz primarno sterilnih kužnin.
ID Pliberšek, Tadej (Author), ID Matos, Tadeja (Mentor) More about this mentor... This link opens in a new window

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Abstract
Invazivne mikoze so glivne okužbe med katere uvrščamo širok nabor stanj in bolezni, katerih razplet je odvisen od vrste povzročitelja ter od mesta okužbe. Diagnostika glivnih patogenov v primarno sterilnih kužninah z metodami kultivacije, je ključnega pomena, v postopku zdravljenja bolnika, občutljivost ter čas do detekcije pa sta ključna indikatorja uspešnosti testa. Kultivacija krvi septičnega bolnika v hemokulturnih stekleničkah ob sumu na invazivno mikozo je priporočljiva iz strani EFISG (angl. ESCMID Fungal Infection Study Group). Za potrditev invazivne kandidoze predstavlja detekcija gliv z uporabo hemokulturnih stekleničk zlati standard. V naši raziskavi smo s simuliranimi vzorci kužnin ugotavljali, kako učinkovite (občutljivost in čas do detekcije gliv) so hemokulturne stekleničke za detekcijo glivnih patogenov iz drugih sterilnih kužnin. Ugotovili smo, da je občutljivost metode za detekcijo patogenih gliv s hemokulturno stekleničko BD BACTEC-Mycosis IC/F iz simuliranih primarno sterilnih kužnin je 100 %, občutljivost s stekleničko BD BACTEC Plus Aerobic/F znaša 95,3 %. Ugotovili smo, da je povprečni čas do detekcije vseh skupin gliv, razen pri nekaterih vrstah plesni, najhitrejši pri uporabi hemokulutrne stekleničke BD BACTEC-Mycosis IC/F. Statistično značilno hitrejši čas do detekcije v primerjavi z uporabo hemokulturne stekleničke BD BACTEC Plus Aerobic/F, smo dokazali, pri detekciji gliv iz rodu Cryptococcus pri uporabi koncentracije začetnega inokuluma 10 CFU/mL in 100 CFU/mL (p = 0,002/0,001) in pri detekciji gliv iz rodu Aspergillus, pri uporabi koncentracije začetnega inokuluma 100 CFU mL (p = 0,027). Ugotovili smo, da je uporaba hemokulturne stekleničke BD BACTEC Anaerobic Plus/F neprimerna za detekcijo patogenih gliv v primarno sterilnih kužninah zaradi izjemno nizke občutljivosti (11,6 % - 13,95 %).

Language:Slovenian
Keywords:invazivne mikoze, molekularna diagnostika, hemokulture, hemokulturne stekleničke, primarno sterilne kužnine, BACTEC, molekularne metode, MALDI-TOF MS
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:BF - Biotechnical Faculty
Publisher:[T. Pliberšek]
Year:2020
PID:20.500.12556/RUL-117272 This link opens in a new window
UDC:616.992:577.2.083
COBISS.SI-ID:22070275 This link opens in a new window
Publication date in RUL:04.07.2020
Views:1912
Downloads:247
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Secondary language

Language:English
Title:Assessment of adequacy of haemoculture bottles for fungi detection in primary sterile bodily fluids
Abstract:
Invasive mycoses are fungal infections that can cause a broad spectrum of clinical symptoms and diseases, which are dependant on the site of infection and the causative agent. Diagnostics of fungal pathogens in primary sterile bodily fluids is a key factor in treatment of patient. Sensitivity and time to detection are key factors of successfulness of test. Cultivation of primary sterile bodily fluids in hemoculture bottles is recommended, when there is a suspicion of invasive mycosis, by EFISG. For confirmation of invasive candidiasis, detection of pathogen with hemoculture method is golden standard. In our research we used simulated primary sterile bodily fluids, to assess sensitivity and time to detection of blood culture bottles for diagnostics of fungal pathogens. We found that sensitivity of BD BACTEC-Mycosis IC/F bottle for detection of pathogenic fungi in simulated primary sterile bodily fluids was 100 % and that sensitivity of BD BACTEC Plus Aerobic/F bottle was 95,3 %.We found that average time to detection of all groups of fungi, except some genera of moulds, is fastest when we used BD BACTEC-Mycosis IC/F bottle. Statistical difference in time to detection, in comparison with usage of BD BACTEC Plus Aerobic/F bottle, was noticed, when we detected Cryptococcus species at concentration of inoculum 10 CFU/mL and 100 CFU/mL (p = 0,002/0,001) and when we detected Aspergillus species at concentration of inoculum 100 CFU/mL (p = 0,027). We found out that usage of BD BACTEC Anaerobic Plus/F isn't suitable for detection of pathogenic fungi in primary sterile bodily fluids, for it's poor sensitivity (11,6 % - 13,95 %).

Keywords:invasive mycosis, molecular diagnostics, blood culture bottles, primary sterile bodily fluids, BACTEC, molecular methods, MALDI-TOF MS

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