Quick read
Key points
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Botulism is a rare but serious illness caused by a toxin produced by the bacteria Clostridium botulinum, which affects the nervous system and can cause progressive muscle weakness, including of the muscles used for breathing. It can occur from eating contaminated food, particularly improperly canned or preserved food, through wound infection, or, rarely, in infants from certain foods like honey.
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Topic-specific prevention and risk reduction will be added during the article-specific evidence audit.
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You develop difficulty swallowing, speaking, or breathing after eating home-preserved food
01 · Know
What is Botulism?
Botulism is a rare but serious illness caused by a toxin produced by the bacteria Clostridium botulinum, which affects the nervous system and can cause progressive muscle weakness, including of the muscles used for breathing. It can occur from eating contaminated food, particularly improperly canned or preserved food, through wound infection, or, rarely, in infants from certain foods like honey.
Botulism requires urgent hospital treatment, including antitoxin medication, and sometimes breathing support while the body recovers. With prompt treatment, most people recover, though recovery can take weeks to months as the nervous system heals.
02 · Understand
Clinical context
Home canning and preserving carry a specific risk
Improperly home-canned or preserved low-acid foods, such as vegetables, can allow botulism bacteria to grow — following tested, safe canning methods significantly reduces this risk.
03 · Act
Seek Emergency Care Immediately If
- 1You develop difficulty swallowing, speaking, or breathing after eating home-preserved food
- 2You notice blurred vision, drooping eyelids, or progressive weakness
- 3An infant under 12 months shows unusual weakness, poor feeding, or a weak cry, especially after eating honey (which should never be given to infants under 1 year)
04 · Prevent & manage
Practical steps
This Requires Emergency Hospital Treatment
Botulism cannot be managed at home — it requires immediate emergency assessment and treatment, including antitoxin medication, to prevent progression to life-threatening breathing difficulty.
- 1Seek emergency care immediately for suspected symptoms.Early treatment with antitoxin is most effective, so don't wait to see if symptoms improve.
- 2Never give honey to infants under 12 months.Infant botulism can occur from honey, which is why it's not recommended for babies under one year.
- 3Follow safe, tested canning and preserving methods.This significantly reduces the risk of botulism from home-preserved food.
- 4Discard bulging or damaged cans.A bulging can or one with a damaged seal can be a sign of dangerous bacterial contamination.
Medical information notice
Health education, not individual medical advice
BarnMD Health Library provides general health education for public health literacy. Reading this article does not establish a doctor-patient relationship and this information is not a diagnosis, prescription, or personalised treatment plan. If you have symptoms or concerns about your health, seek appropriate advice from a qualified healthcare professional. If you develop emergency warning signs, seek urgent or emergency medical attention.
BarnMD Bottom Line
Botulism is rare but serious, and prompt emergency treatment leads to good recovery for most people.
Never give honey to infants under 12 months, and always follow safe, tested methods for home canning and food preservation.