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Toxins

Toxins are substances created by plants and animals that are poisonous to humans. Toxins also include some medicines that are helpful in small doses, but poisonous in large amounts.

Most toxins that cause problems in humans come from germs such as bacteria. For example, the symptoms of cholera are caused by a toxin made by cholera bacteria.

Other toxins that cause problems include metals, such as lead, and certain chemicals in the environment.

References

Kao LW, Rusyniak DE. Chronic poisoning, trace metals and others. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 22.

Meehan TJ. Approach to the poisoned patient. In: Walls RM, Hockberger RS, Gausche-Hill M, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 9th ed. Philadelphia, PA: Elsevier; 2018:chap 139.

Text only

  • Bacteria

    Bacteria - illustration

    Bacterial infections can lead to the formation of pus, or to the spread of the bacteria in the blood.

    Bacteria

    illustration

    • Bacteria

      Bacteria - illustration

      Bacterial infections can lead to the formation of pus, or to the spread of the bacteria in the blood.

      Bacteria

      illustration

     

    Review Date: 4/8/2019

    Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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