4.1. Microbial Analysis as Particles

Try these first

1. 1.

   What does CFU stand for?

   Hint

   Think about how we count bacteria.

2. 2.

   What does filtration help to achieve in microbial analysis?

   Hint

   Focus on the physical process of separating.

3. 3.

   What does the CPCB standard refer to?

   • Number of pathogens allowed in drinking water
   • Maximum turbidity in water
   • Minimum pH level of water

   Hint

   Think about what the CPCB aims to monitor in water.

4. 4.

   True or False: Non-viable microorganisms can still cause infections.

   • True
   • False

   Hint

   Consider the definitions of viable versus non-viable organisms.

5. 5.

   If a water sample has an initial count of 100 bacteria and we dilute it by a factor of 10, how many colonies would you expect to see if you count 5 colonies after culture?

   Hint

   Remember the dilution factor concept and how it affects colony calculations.

6. 6.

   Discuss the implications of using turbidity levels alone to assess water quality in the presence of unknown pathogens.

   Hint

   Consider the depth of analysis needed for comprehensive water quality assessments.