 |
| |
Botulism ~ an
Avoidable Risk
Botulism
A
severe, sometimes fatal food poisoning caused by ingestion of food
containing botulin and characterized by nausea, vomiting, disturbed
vision, muscular weakness, and fatigue. Symptoms also include
difficulty in swallowing, speech and breathing.
Doesn’t sound
like anything I want to mess around with.
Did you know that Chlostridium Botulinum spores are on most fresh food
surfaces?
It is in the dirt, it is just about everywhere.
The spores are harmless on fresh foods. However, when certain
conditions
exist, these spores will germinate, multiply, begin dying,
and then produce a
deadly toxin. It is
this toxin that causes serious food poisoning.
The conditions where the spores become dangerous
are:
- absence of oxygen,
- low acidity levels, and
- temperatures between 40 and 120 degrees
Fahrenheit (4.5 to 49 degrees Celsius)—
Sounds just like the conditions in canned foods! Both home
canned or commercially canned. So how do we get rid of it???
Heat. Botulism spores are killed at temperatures
above 240 degrees Farenhieght . This is only
achievable in a pressure canner.
As a home
canner, If you follow the recommended guidelines, and process your
foods with the correct methods you should have no
problems.
As an added
precaution it is suggested that you boil low acid foods before serving.
This includes all vegetables and meats.
There
is apparently some debate even among extension services about whether
this is a necesary step. If you have questions about the importance of
boiling your low acids, call your local extension service and ask for
more details.
I have decided that the extra step is not that much work and it gives me peace of mind and so I do it.
Boil for 10 minutes, plus one
minute per 1,000 feet above sea level. Home canned spinach
and corn
should be boiled for 20 minutes before eating.
This
is especially important at higher altitudes and in the Western United
States. Soil in the area from the Rocky Mountains to
the
Pacific Ocean contains higher rates of Type A Clostridium
botulinum.
Related pages:
Pressure
canning
Water
bath canning
|
|