Home Canning and Botulism
Home canning is an excellent way to preserve garden produce and share it with family and friends. But it can be risky- or even deadly- if not done correctly and safely .
What is botulism? Botulism is a rare but potentially deadly illness caused by a poison most commonly produced by a germ called Clostridium botulinum. The germ is found in soil and can survive, grow, and produce a toxin in certain conditions, such as when food is improperly canned. The toxin can affect your nerves, paralyze you, and even cause death. You cannot see, smell, or taste botulinum toxin—but taking even a small taste of food containing this toxin can be deadly
How can I keep myself and others safe when it comes to home-canned foods? Many cases of foodborne botulism have happened after people ate home-canned, preserved, or fermented foods that were contaminated with toxin. The foods became contaminated because they were not canned (processed) correctly.
You can take steps to protect yourself, your family, and others when it comes to home-canned foods by following these tips:
1. Use proper canning techniques. The best way to prevent foodborne botulism is by carefully following instructions for safe home canning in the USDA Complete Guide to Home Canning. Do not follow recipes and cookbooks that do not follow the steps in the USDA guide, even if you got these items from a trusted friend or family member. You can learn more about proper home canning from these resources: The National Center for Home Food Preservation State and county extension services
2. Use the right equipment for the kind of foods that you are canning. Pressure canning is the only recommended method for canning low-acid foods. Foods with low acid content are the most common sources of home canning related botulism cases. Low-acids foods include almost every vegetable, some fruits, milk, all meats, fish, and seafood. See box to the right for examples. Do not use boiling water canners for low-acid foods because they will not protect against botulism. Always use a properly sized pressure canner that meets USDA recommendations for pressure canning when canning low-acid foods. Contact your state or county extension service to find out if your pressure canner meets USDA recommendations.
3. When in doubt, throw it out! If there is any doubt if safe canning guidelines have been followed, do not eat the food. Home-canned and store-bought food might be contaminated with toxin or other harmful germs if
- the container is leaking, bulging, or swollen;
- the container looks damaged, cracked, or abnormal;
- the container spurts liquid or foam when opened;
- the food is discolored, moldy, or smells bad.
If the container or the food inside has any signs of contamination, throw it out! If any of the food spills, wipe up the spill using a solution of 1/4 cup bleach for each 2 cups of water.
Source: The Ohio State University Extension
| 
