Biomedical Engineering Reference
In-Depth Information
Bacterial toxigenics
Bacillus anthracis (i.e., anthrax toxin)
Bacterial spores are inhaled and uptaken
by macrophages
Spores become active bacilli and rupture
macrophages, releasing bacteria into
bloodstream, where the anthrax toxin is
released
Anthrax toxin enables bacteria to evade
the immune system, proliferate, and
ultimately cause polyfocal effects
Anthracic meningitis
Inhibition of protective immune responses
Cell lysis and destruction
Bleeding and death
Clostridium botulinum (i.e., Botulinum toxin)
(also,  C. butyricum, C. baratii, C. argentinense )
Decreased ACh release
Decreased neuromuscular transmission
Induces laccid paralysis and cardio-respiratory
failure
Several genera of Cyanobacteria (e.g., Anabaena,
Aphanizomenon, Oscillatoria, Microcystis,
Planktothrix, Raphidiopsis, Arthrospira,
Cylindrospermum, Phormidium ) (i.e.,
anatoxin-α)
Stimulates nicotinic ACh receptors
Mimics ACh causing irreversible
stimulation of NMJ
Permanent contraction of muscles
Loss of coordination, twitching, convulsions, and
rapid death by respiratory paralysis
Gambierdiscus toxicus (i.e., ciguatoxin)
Lowers the threshold for activating
voltage-gated sodium channels
Causes headache, muscle aches, weakness,
dizziness, itching. nightmares, and/or
hallucinations.
Causes paresthesias (e.g., sensation of burning or
“pins-and-needles,” reversal of hot and cold
temperature sensation, or unusual tastes)
Very low mortality; recovery within 1 month.
ACh, acetylcholine; CNS, central nervous system; DA, dopamine; NMJ, neuromuscular junction.
 
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