Lijst te kennen micro-organismen
Bacteriën
E. coli - Staafvormige cellen
- Gram-negatief
- Na extractie: bact chromosoom = grote, cirkelvormige, dubbelstrengige
DNA-molecule, 1000 µm lang DNA
- Heterotroof: halen C uit organische bron, N uit (an)organische bron
- Facultatief anaëroben: O2 speelt geen rol
- Generatietijd: 22 min in een rijk milieu
- 2 soorten elektronen-acceptoren: moleculaire O en organische stof
- Commensalen leven bij hun gestheer zonder schade aan te brengen
- Bezit het flagellair H antigeen (filament)
- Wijst op faecale verontreiniging (controle water)
- Gebruikt bij insuline; stam die humane insuline-gen draagt op plasmide
- Gebruikt bij humaan groeihormoon, voor kinderen met bv dwerggroei
Staphylococcus aureus - Bolvormige cellen, stafylokokken
- Gram-positief
- Penicilline is hier werkzaam tegen
Clostridium perfringens - Gram-positief
- Voedselvergiftiging en gasgangreen
Bacillus subtilis
Bacillus anthracis - Pathogene bacterie
- Verwekker van miltvuur
- In 2001 biologische aanval in de VS
- Cutane, pulmonaire en gastro-intestinale vorm
Bacillus cereus - Bevat flagella
- Kan voedselvergiftiging veroorzaken (pasta en rijst te lang en niet koud
genoeg bewaard)
- Soorten bestemd tegen koelkasttemperaturen
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