We report a patient with Whipple's disease who developed a myopathy that improved during antibiotic therapy. The muscle biopsy showed mild type 2 fibre atrophy, type 1 fibre preponderance, variability in fibre size, and changes in the myofibrillar pattern of affected fibres. Interfascicular macrophages contained PAS-positive material. With the electron microscope these macrophages contained membranous inclusions and bacillary bodies, similar to those seen in the jejunal biopsy.
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Swash et al. (1977) studied this question.
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