<prompt> Botulinum affects all exceptNeuromuscular junctionPreganglionic junctionPost ganglionic nervesCNS  <response>: Botulinum toxin acts by blocking the production or release of acetylcholine at the synapses and NMJ. CNS is spared. Onset is marked by diplopia, dysphagia and dysahria due to cranial nerve involvement. Reference: Textbook of Microbiology; Anathanarayan and panikers; 10th edition; Page no: 269 