cul char Flashcards
Refers to the coloration observed in bacterial or fungal colonies grown in agar plates
Colony pigmentation
It measure the diameter of the colony in millimeters
Size
Size includes
Pinpoint, a small,, medium,, large
For filamentous organism
Dry weight determination
enumeration of bacteria in milk
Bio chemical activity
Most commonly used method
Plate count
It measures the number of viable cells
Plate count
enumeration of bacteria and milk, food, water and soil
Plate count
How many colonies in plate count
30 to 300 colonies
Polycarbonate membrane filter
Membrane or molecular filter
And numeration of bacteria in food and water including lakes and streams
Membrane or molecular filter
Microscopic count for prokaryotes
petroff-hauser counter
Microscopic count for prokaryotes and eukaryotes
Hemocytometer
I numeration of bacteria and milk and vaccine
Microscopic count
Microscopic count for milk
Breed count method
How many cells or millimeters in turbidimetric method
10,000,000 to 100,000,000 cells
Methods of measuring bacterial growth
Cell count, cell mass, cell activity
Measured by weighing, measuring nitrogen content, turbidimetric
cell mass
Measured by microscopy, electronic particle counter or colony count
Cell count
Measuring by relating bio chemical activity
Cell activity
Colonies may either be flat or raised
Elevation
Maybe be opaque, translucent or opalescent
optical features
Size of punctiform
Less than 1 mm
Size of small
1-2 mm
