Growth on the MacConkey agar and NA plates was recorded as "good growth," "poor growth," or "no growth." These are qualitative and, at least for the first two, subjective terms. What did you use to establish what constituted "good growth?"

Appearance in stock solution of 15 or more colonies.

Explanation:

Microbiological experiments are normally carried out so as to be able to analyze the ability to consume a substrate and the growth pattern and to multiply the mass and number of multiple microbes. Generally, brotg or agar remains the preliminary substrates use for microbial growth analysis. The usual methods include dilution of the stock solution, plate plating and observations after a growth period of at least 24 hours. Good growth: Good microbial growth is talking about the appearance in stock solution of 15 or more colonies. This type of solutions are considered to be averagely concentrated in nature.

The nutrient agar plate inoculated with the same organisms provided examples of what "good growth" for each organism looks like on a non-selective medium.

Explanation:

"Good growth", "poor growth" and "no growth" are the ways to describe the visibility of the microorganisms on the media.

The "good growth" stipulates that the are visible on the agar used to the formation of its colony on it. This means that, that specific agar support the growth of that particular organism.

The "poor growth, stipulates that the agar or medium is not that suitable for the growth of the organism. In this case, the growth of the organism will be scanty on the plate.

And the "no growth" term means the agar does not support the growth of the organism at all. in this case, no growth will be seen on the plate.

In conclusion, if the answer given above is not available for comparison, it wouldn't be possible or difficult to tell if sparse growth on MSA was due to inhibition or was just normal growth for that species.