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Botulinum toxin, or botulinum neurotoxin (commonly called botox), is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species. [24] It prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction , thus causing flaccid paralysis . [ 25 ]
This generally only occurs with inappropriate strengths of botulinum toxin for cosmetic use or due to the larger doses used to treat movement disorders. [2] However, there are cases where an off-label use of botulinum toxin resulted in severe botulism and death. [25] Following a 2008 review the FDA added these concerns as a boxed warning. [26]
Along with some strains of Clostridium butyricum and Clostridium baratii, these bacteria all produce the toxin. [2] Botulinum toxin can cause botulism, a severe flaccid paralytic disease in humans and other animals, [3] and is the most potent toxin known to science, natural or synthetic, with a lethal dose of 1.3–2.1 ng/kg in humans. [4] [5]
Botulinum toxin A has also been used to treat spasmodic torticollis (i.e., involuntarily neck turning), blepharospasm (involuntary contraction of the eye lids), and other uncontrolled facial muscle spasms in people with myasthenia gravis without side effects or with only short-lived dysphagia or diplopia. Botulinum toxin A treatment, it is ...
BAT is the only FDA-approved product available for treating botulism in adults, and for botulism in infants caused by botulinum toxins other than types A and B. BAT has been used to treat a case of type F infant botulism and, on a case-by-case basis, may be used for future cases of non-type A and non-type B infant botulism.
This process involves inactivating the toxin, creating a toxoid that does not induce toxin-related illness and is well tolerated. [8] A widely used toxoid vaccine is the DPT vaccine , which is usually administered in multiple doses throughout childhood with adjuvants and boosters for long-term immunity. [ 8 ]
Botulinum toxin therapy of strabismus is a medical technique used sometimes in the management of strabismus, in which botulinum toxin is injected into selected extraocular muscles in order to reduce the misalignment of the eyes. The injection of the toxin to treat strabismus, reported upon in 1981, is considered to be the first ever use of ...
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