Great work. Congradulations!!
Donna Ron
Israel
-----Original Message-----
From: Lactation Information and Discussion
[mailto:[log in to unmask]] On Behalf Of MomtoLJ
Sent: Thursday, June 09, 2005 7:35 AM
To: [log in to unmask]
Subject: Re: Proud Mom of 14 yr old 8th grade breastmilk researcher
Wow, congrats to your son. He did a fine job! What a great project.
Joylyn
[log in to unmask] wrote:
>I am pleased to announce that my son won 3rd place at the California
>State Science Fair in the Junior Division (6-8th grade) Microbiology
>section with his breastmilk project. His abstract is below.
>
>Bacterial Activity in Fresh & Frozen Human Milk as Compared to Cow’s
>Milk & Baby Formula
>
>Microbiology
>
>Objectives/Goal: Human milk is the best food for human infants, but
>many women work and must store their milk for later use. The objective
>of my project was to measure the bacterial activity in human milk
>compared to cow’s milk and
> formula, both fresh and after freezing for different periods of time.
>
>Materials/Methods: The Methylene Blue dye test was used to measure the
>relative aerobic bacterial content of various milks (fresh and
>pasteurized human milk, fresh and pasteurized cow’s milk, and infant
>formula) tested fresh and after freezing for 3, 10 and 26 days in a
>household freezer at approximately – 17.5°C. Each sample had a
>control. In this test, the more rapid the color change, the more
>bacterial growth. Color change was recorded by time and
>photographically up to 72 hrs at body temperature. The results of the
>experiment were compared to the bacterial count and graded milks
>standard charts. In Phase II additional samples frozen 4-5 months were
tested and a simple home test kit was designed.
>
>Results: All milks tested exceeded the highest commercial standards for
cow’
>s milk. Human milk had the greatest resistance to aerobic bacterial
>growth with no color change, except for 1 sample, for more than 72 hrs.
>Raw cow’s milk had the greatest aerobic bacterial activity. Freezing
>had no effect on the bacterial activity of the milks, with the
>exception of pasteurized cow’s milk that increased in bacterial activity
with the length of time frozen.
>
>Conclusion/Discussion: Human milk is the best food for human infants,
>but many women work and must store their milk for later use. One of
>the human milk samples (frozen 10 days) changed color after only 10
>hrs, indicating increased bacterial activity, possibly due to illness
>in the donor or contamination during collection or processing. A
>simple home test kit was designed and tested to help mothers who may be
>concerned about the quality of their milk. Human milk is the safest,
>best food for human infants, even when frozen for extended periods of time.
>
>Summary Statement: Human milk inhibits bacterial growth more than
>cow’s milk or formulas, even after extended frozen storage, making it
>safest for infants whose mothers need to express and store milk for later
use.
>
>Help Received in Doing Project: My mother obtained human milk samples
>and helped with the graphs. My father helped me set up my experiment
>and helped organize the poster board. Both parents helped edit my report.
>
>Nancy
>Nancy E. Wight MD, IBCLC, FABM, FAAP
>Neonatologist, Sharp Mary Birch Hospital for Women and Children's
>Hospital Medical Director, Sharp HealthCare Lactation Services San
>Diego, CA [log in to unmask]
>
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