Food Preservation
Current
Situation
Foodborne illness
is a major health issue facing Americans. Between 6.5 million and 81 million
cases of foodborne illness and as many 9,100 related deaths occur annually.
Millions of illnesses and thousands of deaths in the United States can
be traced to contaminated food. Illnesses from pathogenic bacteria appear
to be increasing each year. The economic devastation of this disease is
considerable, with an estimated $420 spent on direct medical costs and
$7.3 billion attributed to lost productivity annually.
Americans expect
many things from their food supply. They want variety and quality; and
they want nutritious, safe foods at a reasonable cost. The definition
of good quality can be varied depending upon the type of food and
the individual's food preference. Some of the important characteristics
of quality include wholesomeness, freshness, nutritional value, texture,
color, aroma and flavor. To many consumers, safe food means that there
will be no danger from pathogenic microorganisms, naturally occurring
toxins and other potentially harmful chemicals which may be deliberately
added to foods.
However, scientists
generally agree that microorganisms pose a greater threat to human health
than other sources of foodborne illnesses. Foods don't cause illness;
bacteria and other pathogens do. However, raw foods of animal origin -
meat, poultry, eggs, fish, shellfish - frequently are contaminated with
bacteria common in the food chain. In other cases, healthy food handlers
may contaminate food with bacteria common in the human body, or diseased
food handlers may contaminate food with lesser common pathogens.
Recent outbreaks
of foodborne illness and deaths associated with commercial food establishments
have received widespread media and public attention. As a result, consumers
have a heightened concern for the safety of commercially prepared foods.
Furthermore, commercial foodservice establishments have a heightened awareness
of their role in providing safe food to consumers.
The food and beverage
industry ranks fourth in size among all the industries of the United States.
Americans spend an estimated $145 billion annually for food and beverages
consumed both in and out of the home. Presently, 85% of Americans consume
at least one meal outside of the home during a two week period. It is
expected that by the year 2000, one third to one-half of all meals consumed
will be purchased through food service establishments. For Mississippi's
approximately 16,600 commercial foodservice establishments, that equates
to an estimated 2.4 - 3.7 million meals annually. An industry of this
size cannot afford to lose the confidence of its clientele.
Whether raw foods
are contaminated at the time of purchase or purchased foods are contaminated
by food handlers, over time, mishandling can allow bacteria to survive,
reproduce, or in some cases form a toxin in food or the human body. In
short, food handling errors are almost always directly associated with
the "dinner plate" microbial contamination that is a prerequisite for
foodborne illness.
Health and well-being
are highly valued in today's society and food is considered to play a
major role. Food safety issues are complex and consumers vary greatly
in their knowledge of the science of food safety. The Cooperative Extension
Service through its federal, state and county partnership of professionals
has as a goal to deliver food safety and quality educational programs.
The programs teach clientele to minimize potential food hazards throughout
food production, processing, distribution, preparation and utilization.
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Frequently
Asked Questions
Food Preservation
Jellies
Why
should cooked jelly be made in small batches?
Should
jelly be boiled slowly or rapidly?
What
do I do if there's mold on my jellied fruit product?
Why
did my jellied fruit product ferment, and what do I do?
Why
do crystals form on the jelly and how can I prevent it?
Why
do bubbles form on the jelly and how can this be prevented?
Why
is my jelly always too soft?
What
causes the jelly to "weep"?
What
does it mean if the color of my jelly is darker than normal?
What
makes jelly look cloudy?
What
makes the jelly stiff too tough?
Preserves
What
makes the preserves look shriveled?
Why
do my preserves have an off flavor?
What
makes the texture of preserves tough?
What
causes a product to be sticky or gummy?
What
makes the color of my preserves darker than normal?
Why
did my preserves lose their color?
What
causes mold or fermentation to occur in preserves?
Canning
Can
food be recanned if the lid does not seal?
If
my recipe doesn't call for processing, do I need to do so?
Do
I really need to leave a certain amount of head space in the jar?
How
long will canned food keep?
Is
it necessary to sterilize jars before canning?
Is
it safe to process food in the oven?
Can
two layers of jars be processed in a canner at one time?
Is
it necessary to exhaust a pressure canner?
Should
liquid lost during processing be replaced?
Why
is open kettle canning not recommended?
Why
do the undersides of metal lids sometimes discolor?
What
causes jars to break in a canner?
If
I find mold growing inside a jar of canned food, can I just scrape it
off and eat the food?
How
can I remove scale or hard-water film from canning jars?
Is
it safe to can food without salt?
Is
it safe to can fruits without sugar?
Can
fruits and vegetables be canned without heating if aspirin is used?
Is
it safe to can green beans in a boiling water bath if vinegar is used?
Should
all vegetables be precooked before canning?
Should
all vegetables expand instead of shrink during processing?
What
causes corn to turn brown during processing?
What
causes moisture to accumulate in jars and containers?
Insects
were in my jar products! How can I stop this from happening again?
Drying
What
causes mold to form on foods during the drying process?
What
is the cause of the brown spots on the vegetables I dry?
How
can I tell when fruit leather is dry?
What
are other uses of a food dehydrator?
Freezing
Why
did I find holes in my plastic freezer bags?
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Publications
MSUcares
Health and Nutrition Publications
Nutrition
News & Views Newsletter
Nutrition News & Views is intended as a source of up-to-date information
on food and nutrition related topics. It is designed for use primarily
by Cooperative Extension Service county personnel in Mississippi.
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Other
Food Preservation Information
The following is
a short list of relevant sites on the WWW that provide information and
resources related to food safety and quality . These sites are maintained
by educational institutions, non-profit organizations, government agencies,
or trade associations none are commercial in nature.
TRADE ASSOCIATIONS
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