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Labo microbiologie: samenvatting theorie

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Samenvatting van alle theorie Labo microbiologie

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Uploaded on
January 9, 2022
Number of pages
4
Written in
2020/2021
Type
Summary

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1. Voedingsbodems

Bacteriën: pH 6-8

Schimmels (gisten): pH 5-6

Bevat:

- C-bron -> suiker, zetmeel
- N- bron -> bouillon
- Zouten (mineralen)
- Vitaminen
- Stolmiddel

Indeling

- Aggregatietoestand
o Agar
 Zeewier
 Onafbreekbaar
 Vloeibaar door koken, tot 45°C
 1-3% nodig voor VB
o Gelatine
 Beenmerg
 Soms afbreekbaar, vervloeiing
 10-15% nodig
 Vloeibaar vanaf 28°C, niet mogelijk om te incuberen op 37°C
- Samenstelling
o Natuurlijk (bv. stuk fruit)
o Niet-synthetisch: bevat extracten (bouillon)
o Synthetisch: nooit extracten
- Toepassingsmogelijkheden
o SB: Standaard Bouillon -> basis
o SBA: Standaard Bouillon Agar -> vaste bodem
o SDA: Sabouraud Dextrose Agar -> schimmels (gist)
o SB + 1% glucose -> vergisting van glucose nagaan, zuurvorming (indicator: BTB)
o SBG (SB + gelatine): Aanwezigheid gelatinase nagaan
o SBA + 7,5% NaCl: halofiele bacteriën
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