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Lyme borreliosis is responsible for a large variety of peripheral neurologic manifestations including axonal polyneuropathy, radiculopathy, and facial nerve palsy. The prevalence of the
disease must draw our attention on the possible responsibility of Borrelia burgdorferi in the pathogenesis of such symptomatology. Electrophysiologic studies demonstrate a proximal and distal axonal involvement, whereas neuropathologic studies suggest that vasculitis might be one of the primary pathophysiologic mechanisms. Electromyography provides a useful diagnostic tool and an important measure of response to treatment. Although peripheral neuropathy usually improves, our case report confirms the fact that chronic neurologic manifestations may not consistently resolve with appropriate treatment.