measuring microbial growth

• in what ways is population growth estimated and analysed


  environmental health officers regularly inspect food premises , water authorities check water supplies daily and food manufactures check that food if safe to eat
• what is meant by total cell count


  Number of cells dead or alive.
• what is meant by total viable count


  living cells in a known volume of liquid medium
• what are the two ways to directly count cells

  total cell count and total viable count
• what piece of equipment can be used to count cells

  a haemocytometer
• what is the function of a haemoctyometer


  this is used to measure all microbes in a sample
• what is a haemocytometer


  this is a microscope slide with a rectangular chamber at the centre which is engraved with a grid
• what does a haemocytometre look like

  
• how is a cover slip placed on a haemocytometre


  it is placed on the coverslip support to leave a gap between the glass and the microbes
• how large is the space between the coverslip and the haemocytometer


  0.1mm
• what type of count would a haemocytometer be , explain why


  total cell count as cant distinguish between living and dead cells
• how does a haemocytometry work

  by introducing a standard amount of bacteria solution in to the haemocytometer and then placing it under a microscope can counting