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Subject:
From:
Rachel Myr <[log in to unmask]>
Reply To:
Lactation Information and Discussion <[log in to unmask]>
Date:
Wed, 23 Apr 2008 18:55:11 -0400
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Judy H in upstate NY asks about the test of thawed breastmilk which someone 
in Norway carried out some years back.  It was not a study, but a less formal 
experiment.  Samples of expressed breast milk were stored in the fridge or 
frozen and thawed, some in water baths, some at room temp and some by 
microwaving, and inoculated with bacteria.  Bacteria growth in the various 
samples was compared.  Expressed milk that was thawed in a microwave oven 
did not inhibit bacterial growth any more than breastmilk substitutes do.  
Expressed milk that had been frozen and thawed by other means, even frozen 
and thawed TWICE, continued to inhibit bacterial growth almost as effectively 
as freshly expressed milk did.  None of the expressed milk was ever 
pasteurized.
This was never published as scientific work as far as I know.  It was an 
experiment, and should really serve as inspiration to do an actual study to see 
whether these findings are replicable with more samples.

Cheers
Rachel Myr
Kristiansand, Norway

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