What is botulism?


Botulism is a rare but very serious type of food poisoning caused by toxins produced by bacteria (Clostridium botulinum) that are commonly found in soil. Botulism is often caused by food that is not home-canned properly, such as home-canned beans and corn.

In children younger than 1 year, botulism may be caused by bacteria found in honey. An adult's digestive system can defend against the bacteria in these foods, but an infant's digestive system cannot. Newborns and infants should not be given honey.

Symptoms of botulism usually begin 12 to 36 hours after the person eats contaminated food. Symptoms include blurred or double vision, muscle weakness, fatigue, dizziness, and headache. The person may also have nausea, vomiting, diarrhea, and abdominal pain. The most noticeable symptoms in children include double vision, irritability, and muscle weakness. Some children may have vomiting, constipation, inability to pass urine (urinary retention), and a dry mouth.

Botulism is potentially fatal and requires immediate medical care. People who have botulism will often be admitted to a hospital for treatment.

What are the symptoms of botulism?

The symptoms of food-borne botulism may include double vision, blurred vision, drooping eyelids, slurred speech, difficulty swallowing, dry mouth, and muscle weakness. Infants with botulism appear to have little energy (lethargic), eat poorly, are constipated, and have a weak cry and poor muscle tone. These are all symptoms of the muscle paralysis caused by the nerve toxin. If botulism is not treated, advanced symptoms may cause paralysis of the arms, legs, and trunk and the muscles that help you breathe. In food-borne botulism, symptoms generally begin 12 to 36 hours after eating a contaminated food.

How is botulism treated?

If diagnosed early, food-borne botulism can be treated with an antitoxin that blocks the action of the botulism toxins.

The paralysis that occurs with severe botulism may cause you to need a breathing machine (ventilator) for weeks, along with intensive medical and nursing care. After several weeks, the paralysis slowly improves.

Infants are usually not given antitoxin. But infants younger than 1 year old can be given a botulism immunoglobulin (BabyBIG) to treat botulism.

How can you prevent botulism?

Food-borne botulism often comes from home-canned foods. You can prevent botulism by following strict procedures when canning and by boiling home-canned food for 10 minutes before eating it. You can get instructions on safe home canning from county extension services or from the U.S. Department of Agriculture. In rare cases, people get botulism from commercially canned and processed foods.

Botulism from more unusual sources, such as chopped garlic in oil, chile peppers, tomatoes, improperly handled baked potatoes wrapped in aluminum foil, and home-canned or fermented fish, have occurred. To prevent this, refrigerate oils with garlic or herbs and serve baked potatoes while they are still hot.

Do not give honey to children younger than 12 months. It can contain spores of C. botulinum.

How is botulism diagnosed?

Your doctor will do a medical history and physical exam and ask you questions about your symptoms and foods you have recently eaten. The best way to be sure of the diagnosis is by checking for botulism in the blood or stool. The test results take several days to complete, so treatment will start before your doctor gets the results.

Other tests that may be done include a brain scan and a spinal fluid exam.

What is botulism?

Food-borne botulism is a rare but serious type of food poisoning that can result in paralysis. It is caused by the Clostridium botulinum (C. botulinum) bacterium. The bacteria produce a nerve toxin that can cause paralysis. Food-borne botulism can be fatal and is considered a medical emergency.

What causes botulism?

Food-borne botulism can be caused by eating contaminated home-canned foods that have a low acid content, such as asparagus, green beans, beets, and corn. But there have been cases of botulism from more unusual sources, such as chopped garlic in oil, chile peppers, tomatoes, improperly handled baked potatoes wrapped in aluminum foil, and home-canned or fermented fish.

In infants, botulism can result if a baby eats honey contaminated by C. botulinum spores. The spores multiply in the infant's intestine and produce toxins.

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