- Criteria Doe establishing a causative link between an ifectous agent and a disease
- how many diffrent species of microbes are there?
- What magnification is necessary to observe Bacteria ? Lens ? And what other help ?
- Sélection of suitable colonies in mixed culture/ouvre Applying to...........using............Dripping..........
- What turbidity (McFarland scale) shall we use and what concentration does it correspond to