Rochester, Minn.
The purposes of this study are to determine if patients treated with fluoroquinolone (FQ) antibiotics have depletion of mitochondrial DNA (mtDNA) in buccal swab samples, and whether the degree of depletion correlates with the likelihood of developing FQ-associated toxicity.
2nd arm - An additional group of patients will be enrolled if they previously received FQ antibiotics. appear to be symptomatic and have a previously collected muscle or nerve biopsy for clinical purposes available for this research study.