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What is botulism?

Botulism is a rare, muscle-paralyzing disease caused by nerve toxin spores made by the bacterium Clostridium botulinum. The spores are found in soil worldwide. There are three main kinds of botulism: food-borne botulism, infant botulism, and wound botulism. Botulism toxin can also be used in a bio-terrorist attack, released into the air or contaminating the food and water supply.                       

How is botulism spread?

Food-borne botulism is usually due to incorrectly prepared or home-canned foods. Outbreaks from commercial products and foods prepared improperly in restaurants have also occurred. Food-borne botulism is especially dangerous because many people can be infected by eating the contaminated food.

Infant botulism occurs in a small number of at risk infants each year. For unknown reasons C. botulinum is able to grow in some infants’ intestines. Infant botulism is not a public health emergency because the infants are not consuming food with toxin; rather they are consuming the spores which are everywhere in the environment.

Wound botulism is caused by the growth of living botulism bacteria in a wound, with ongoing secretion of toxin that causes the paralytic illness. In the United States, this syndrome is seen almost exclusively in injecting drug users.

Botulism is not spread person-to-person.

How common is botulism?

In the United States, an average of 110 cases of botulism is reported each year. Of these, approximately 25% are food-borne, 72% are infant botulism, and the rest are wound botulism.

What are the symptoms of botulism?

General symptoms of botulism include double vision, blurred vision, drooping eyelids, slurred speech, difficulty swallowing, dry mouth, and muscle weakness which always moves down the body from the shoulders to the feet. Paralysis of breathing muscles can cause a person to stop breathing and die, unless assisted by a ventilator.

For food-borne botulism, symptoms begin from six hours to two weeks after eating toxin-containing foods. Most commonly the delay is about 12-36 hours.

Infants with botulism appear tired, eat poorly, are constipated, and have a weak cry and limp muscles.

What is the treatment for botulism?

Botulism can be treated with an antitoxin which blocks the action of toxin circulating in the blood. This antitoxin stops further development of the disease, but cannot reverse paralysis that is already present. The antitoxin is effective in reducing the severity of symptoms if administered early in the course of the disease. The Centers for Disease Control and Prevention (CDC) maintains the nation’s supply of the antitoxin. A physician diagnosing a case of botulism must contact the CDC through their state health department in order to get the antitoxin. Public health officials must be contacted immediately about potential cases of botulism.

The respiratory failure and paralysis that occur with severe botulism may require patients to be on a ventilator for weeks, plus intensive medical and nursing care. After several weeks, the paralysis slowly improves.

Are there complications from botulism?

Botulism can result in death due to respiratory failure; however the number of deaths has decreased dramatically in past years due to improved medical knowledge. Patients who survive an episode of botulism may have fatigue and shortness of breath for years and long-term therapy may be needed to aid recovery.

How can botulism be prevented?

Food-borne botulism can be prevented by practicing safe home canning and food handling. Children less than 12 months old should not be given honey since it can contain spores from the bacteria. Wound botulism can be prevented by promptly seeking medical care for infected wounds and by not using injectable street drugs.

How do I get more information on botulism?

Other Category A disease agents

570 N. Marshall Rd
Coldwater, MI  49036

517-279-9561
20 Care Drive
Hillsdale, MI 49242

517-437-7395
1110 Hill St.
Three Rivers, MI  49093

269-273-2161
 
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