Friday, November 20, 2009

Freezing food will kill all bacteria? True or False?

i think it is false but my brother disagrees

Freezing food will kill all bacteria? True or False?
False (you're right)

Freezing to 0 °F inactivates any microbes -- bacteria, yeasts and molds - - present in food. Once thawed, however, these microbes can again become active, multiplying under the right conditions to levels that can lead to foodborne illness. Since they will then grow at about the same rate as microorganisms on fresh food, you must handle thawed items as you would any perishable food.

Trichina and other parasites can be destroyed by sub-zero freezing temperatures. It is not recommended to rely on home freezing to destroy trichina. Thorough cooking will destroy all parasites.
Reply:definitely false
Reply:but i think that is true coz bacteria could not survive too hot or cold conditions
Reply:its false freezin do kill all bacteria there are somw which can surive high temperature
Reply:Definitely false. Cold temperatures will cause the bacteria to produce spores which are a resistant and metabolically inactive form. In proper conditions like thawing the frozen food, the spore will morph into the bacteria that produced it and reinfect the food.
Reply:100 % false...........................
Reply:Will freezing food kill the bacteria that is in that food?

They say that you should not refreeze food that you have already thawed out. Why not? maybe because freezing will not kill the bacteria that has grown while it was out?

My doctor just gave me some medicine to take. It is Lactobacillus tablets. These contain bacteria. At the pharmacy they where kept refrigirated. On the label it says to keep refrigerated.
Reply:its false..there are some bacteria which survive at extreme conditions.. so freezing wont kill them!
Reply:False. It will immobilise the bacteria, but once the temperature gets higher they will be mobile again.

To kill bacteria you need to heat it up. This denatures the bacteria enzymes and even if the temperature drops again the bacteria wont 'work'.

freezing is another term for crystalizing.

no living thing or organism can survive being crystalized except viruses.

yes. all bacteria will die.

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