1) Pre-analystische fase
- Stalen collectie, clinical informatie collectie, preparatie, transport tot
labo
2) Analytische fase
- Technisch proces
3) Post-analystische fase
- Validation, interpretative van resultaten
Voordelen
- Snelle diagnostische informatie (bv: pneumokokken in CSF of TBC bij ZN kleuring)
- Onderzoek van kwaliteit van staal (bv: sputum -> veel epitheelcellen aanwezig)
Nadelen
- Lage sensitiviteit (25% als < 10^3 CFU/ml & 60-80% als 10^3-10^5 CFU/ml)
- Lage discriminatoire kracht
gram – kunnen alle enterobacterales zijn
commensalen VS pathogenen is moeilijk
BACTERIELE CULTUUR & IDENTIFICATIE
voordelen
- Sensitief
- Detectie van verschillende bac bij = tijd
- Susceptibiliteit testen is mogelijk bij culturen
- Detectie van replicatie duidt op levende bac
nadelen:
- zeer traag (TBC -> 6-8 w)
- niet toepasbaar op niet cultuurbare bacterie (M.pneumonia, M. leprae)
- sensitief voor transport & omgeving
voordelen
- sensitief
- detective van verschillende virussen op = tijd
- susceptibiliteit mogelijk op culturen
- detectie van replicerende = levende virussen
nadelen
- zeer arbeidsintensief, expertise nodig
- late diagnose door lange kweektijden
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