how can you tell whether or not there is bacterial growth in nutrient agar?

Answer 1

usually you can see the colonies in the agar. they'll be kind of circular spots in the agar. then you can put them under a microscope and see what kind of bacteria it is.

Answer 2

The well-known way of determining whether there is bacteria in a nutrient broth is to flow a number of the broth to a sterile agar plate utilising sterile kit (whether it is an innoculating loop or some form of pipette). Incubate the agar plate for twenty-four-40 8 hours. If the agar plate contains bacterial colonies, or is merely lined via a mat of bacteria, then the nutrient broth contained bacteria. If no growth happens on the agar plate after its era of incubation then there have been no bacteria interior the nutrient broth and the broth could be seen sterile.

Answer 3

Usually, you can see it. It will appear as little spots where you smeared your sample. As it grows, the spots will become bigger. 1 mm at first, and upwards of 5 mm after a few days, dependent upon the virulence of the specimen.

Answer 4

you should be able to see colonies of bacteria growing in your dish. They are generally easy to distinguish, visually, from the substrate.

Answer 5

you should see little white pink or blue "dots" they are colonies (concentrated groups of cells)