A few days ago
Biology Help!! A sample of food is dehydrated, which kills all of the bacteria. however, in a few days….?
bacteria free water is added to the food in a bacteria-free environment, Nevertheless, microscopic investigations indicate that bacteria are in the food. how did the bacteria get there????
thanx
Top 4 Answers
A few days ago
Favorite Answer
dehydrating bacteria will not kill it, it only causes it to “hybernate” until conditions are favorable for it to grow again. That is why, for example, beef jerky has so much salt in it. Drying out the meat will not kill the bacteria, but the high salt concentrations will. It is also possible that the bacteria in this case produced endospores as the fellow above mentioned. One more thing, you weren’t clear about this, so maybe the bacteria that is seen with the microscope isn’t actually alive….dehydrating something does not make the bacteria disappear.
1
A few days ago
I would say that spores are the cause of this. Some bacteria, i.e. anthrax can form spores that make them pretty much invulnerable to anything. Several types of bacteria are capable of this.
“The term spore may refer to the dormant stage of some bacteria or archaea”
“Anthrax is one of a few bacteria that can form long lived spores. When the bacteria’s life cycle is threatened by factors such as lack of food caused by their host dying or by a change of temperature, the bacteria turn themselves into more or less dormant spores to wait for another host to continue their life cycle.”
0
5 years ago
Very few bacteria are not killed quickly at 100c.
0
A few days ago
spores?
0
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