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Samenvatting van hoofdstuk 1,2 en 3 van het vak microbiologie in biomedische wetenschappen

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"Deze samenvatting geeft de inhoud weer van zowel de PowerPoint-presentaties als de lessen over de hoofdstukken '1.Introductie', '2.Morfologie bacterïen en archea' en '3.Microbiële structuren' binnen het vak Microbiologie van de opleiding Biomedische Wetenschappen.

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Uploaded on
August 5, 2025
Number of pages
14
Written in
2024/2025
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Inhoud
1.Introductie...................................................................................................................................... 2
Evolutie.......................................................................................................................................... 2
Historisch overzicht........................................................................................................................ 2
Antoni van Leeuwenhoek............................................................................................................. 2
Carolus Linnaeus......................................................................................................................... 2
Louis Pasteur............................................................................................................................... 2
Robert koch................................................................................................................................. 2
Martinus Beijerinck en Sergei Winogradsky................................................................................. 2
Domeinen van het leven................................................................................................................. 2
Nomenclatuur micro-organismen.................................................................................................... 3
2.Morfologie bacteriën en archea...................................................................................................... 4
Unicellulair.................................................................................................................................. 4
Aggregaten.................................................................................................................................. 4
Pleomorfie................................................................................................................................... 4
Associaties.................................................................................................................................. 4
Verscheidene vormen.................................................................................................................. 4
3.Microbiele celstructuur................................................................................................................... 5
1. enveloppe................................................................................................................................... 5
1.1 Celmembraan........................................................................................................................ 5
1.2 Celwand................................................................................................................................ 5
1.3 Extracellulaire omhulsels....................................................................................................... 6
2. Extracellulaire structuren............................................................................................................ 8
2.1 Flagellum............................................................................................................................... 8
2.2 Fimbria.................................................................................................................................. 9
2.3 Curli....................................................................................................................................... 9
2.4 Pilus....................................................................................................................................... 9
3. Cytoplasma + IC structuren...................................................................................................... 10
3.1 DNA..................................................................................................................................... 11
3.2 Ribosomen........................................................................................................................... 12
3.3 Endospore........................................................................................................................... 12
3.4 Inclusies............................................................................................................................. 13




1

, 1.Introductie

Evolutie
Microbiële fossielen: eerste leven op aarde 3,5 tot 4 miljard

- Stromatolieten: afzettingsgesteenten met fossiele filamenteuze micro-organismen
(cyano B)
- Fossiele microbiële matten: In getij gebieden
- Kerogen: organisch materiaal in oude gesteenten

 O2 productie zorgt voor ander leven

Historisch overzicht
Voor 1650: Theorie van spontane generatie (levende organisme uit niet-levend materiaal)

Overdraagzaamheid van ziekte

Vanaf 17e eeuw: Ontwikkeling microscoop (30x) waardoor cel ontdekt

Antoni van Leeuwenhoek
Lichtmicroscoop (270-480x) + Bacterieën (animalcules)

Carolus Linnaeus
Taxonomie van planten, dieren, bacteriën en classificatie

Louis Pasteur
Ziektekiemtheorie mbv pasteurisatie

a. Nonsteriele vl in fles
b. Nek van fles gebogen
c. Vl gesteriliseerd door verhitting
d. Traag afgekoeld – microorganisme vast in boog
e. Geen contact met vl: geen groei
f. Contact door te kantelen: groei van kiemen

Robert koch
Ziektekiemtheorie bevestigd met 4 postulates (voorwaarden)

- Pathogeen aanwezig in zieke organismen en afwezig in gezonde organisme
- Pathogeen kan gekweekt worden in cultuur
- Pathogeen veroorzaakt ziekte in nieuw organisme
- Geisoleerd pathogeen van nieuw ziek organisme moet hetzelfde vertonen als
orgineel

Martinus Beijerinck en Sergei Winogradsky
Grondleggers ecologische bacteriologie

Domeinen van het leven
Fylogenetische stamboom: obv geconserveede rRNA-seq

- Bacteria
- Archea (= B in extreme omstandigheden)


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