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Most food should be bagged or airtightly sealed so that doesnt happen
Food should be served and stored in clean utensils (also stored in a fridge of freezer) to help avoid the risk of food poisoning, notably from Salmonella.
To avoid cross-contamination, and indeed all other forms of contamination.
High risk foods should always be stored properly covered, on the bottom shelf in the refrigerator within two hours of cooking to avoid cross contamination. If you want to save it for longer than a few days, it's a good idea to freeze the food.
To avoid contamination, especially in chemical analysis.
Separate raw meat, poultry, and seafood from other foods in your refrigerator.
This is recommended to avoid contamination with chemicals.
The thought that occurs to me is simply to avoid contamination...
One should change the fridge water filter cartridge at least every six months to avoid contamination. Fridge manufacturers create water filters that are easy to access and replace, but one should consult the user manual before attempting to replace it.
They do not. Food items can be stored in containers which "click" shut. The important thing is to keep the container as air-tight as reasonably possible.
use a linear workflow
Culture media should be specific to avoid contamination of unwanted microorganisms and to obtain a pure culture of microorganisms.