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# Food poisoning: Botulism
- URL: https://www.foodconsumer.org/botulism_1107100654/
- Published: 2010-07-11T18:53:00.000Z
- Updated: 2026-09-22T15:52:21.000Z
- Description: A foodsafety.gov summary of foodborne botulism: its sources, incubation of 3 to 30 days in infants and 12 to 72 hours in older children and adults, and symptoms such as double vision, drooping eyelids and muscle weakness. Botulism is a medical emergency; call a doctor at once.
- Author: Food Consumer
- Tags: Biological, Food Safety, Food Poisoning, Botulism, #vivvo-import

**Sources**

Infants: Honey, home-canned vegetables and fruits, corn syrup

Children and adults: Home-canned foods with a low acid content, improperly canned commercial foods, home-canned or fermented fish, herb-infused oils, baked potatoes in aluminum foil, cheese sauce, bottled garlic, foods held warm for extended periods of time

**Incubation Period**

Infants: 3-30 days

Children and adults: 12-72 hours

**Symptoms**

Infants: Lethargy, weakness, poor feeding, constipation, poor head control, poor gag and sucking reflex

Children and adults: Double vision, blurred vision, drooping eyelids, slurred speech, difficulty swallowing, dry mouth and muscle weakness

**Duration of Illness**

Variable

**What Do I Do?**

Botulism is a medical emergency. If you have symptoms of botulism, contact your doctor immediately.

From foodsafety.gov

**Botulism**

Botulism is a rare but serious illness. Each year, U.S. healthcare providers report an average of 110 cases of botulism to the Centers for Disease Control and Prevention (CDC).

Although there are several kinds of botulism, this topic will focus on botulism caused by eating contaminated food. About 10 to 30 outbreaks of foodborne botulism are reported annually to CDC. This illness does not occur frequently, but it can be fatal if not treated quickly and properly.

**Cause**

Botulism is caused by toxin (poison) produced by Clostridium botulinum bacteria. This toxin affects your nerves and, if untreated, can cause paralysis and respiratory failure. C. botulinum toxin is one of the most powerful naturally occuring toxins. Exposure to the toxin, particularly in an aerosolized (spray) form, can be fatal.

C. botulinum has been made into bioweapons by rogue states and is one focus of current efforts to counter bioterrorism.

**Transmission**

Cases of foodborne botulism often originate with home-canned foods with low acid content, such as asparagus, green beans, beets, and corn. C. botulinum thrives in sealed containers because it is anaerobic, meaning it can survive and grow with little or no oxygen. Outbreaks of botulism, however, are often from more unusual sources such as baked potatoes wrapped in aluminum foil but not kept hot, and tomatoes.

**Symptoms**

Symptoms of foodborne botulism include

Double vision and drooping eyelids

Slurred speech

Dry mouth and difficulty swallowing

Weak muscles

Symptoms usually begin within 18 to 36 hours after you eat contaminated food, but can occur in as few as 6 hours or as long as 10 days afterward. 

**Diagnosis**

A health care provider can use laboratory tests to identify C. botulinum toxin in your blood or stool if you are infected.

**Treatment**

If you are diagnosed with botulism early, your health care provider can treat you successfully with an antitoxin that blocks the action of the bacterial toxin circulating in your blood. Although antitoxin keeps the disease from becoming worse, it will still take many weeks before you recover. Your health care provider may try to remove any contaminated food still in your gut by making you vomit or by giving you an enema.

**Prevention**

To prevent getting foodborne botulism you should

Follow strict hygienic steps when canning foods at home.

Refrigerate oils containing garlic or herbs.

Keep baked potatoes wrapped in aluminum foil should either be kept hot until served or refrigerated.

Consider boiling home-canned food before eating it to kill any bacteria lurking in the food. 

**Complications**

If left untreated, botulism can temporarily paralyze your arms, legs, trunk, and the muscles that help you breathe. The paralysis usually improves slowly over several weeks. People who develop severe botulism experience breathing failure and paralysis and need to be put on ventilators (breathing machines).

from National Institute of Allergy and Infectious Diseases