As seen by other authors (Richardus et al. 1996), more MB than PB patients had NFI at leprosy diagnosis. Croft et al. (2000) found that 21% of PB patients with NFI at diagnosis experienced new NFI events during the second year of evaluation. In addition, other authors (Samant et al. 1999), regardless of the detection of NFI at diagnosis,

have reported a higher frequency of nerve function worsening among PB (20%) over MB (13%) patients at the end of MDT both clinically and/or electrophysiologically. This difference could be due to the earlier period of follow-up evaluation in the latter study. It should also be taken in consideration Inhibitors,research,lifescience,medical that reaction may develop after MDT (Nery et al. 2006) leading to NFI, and NCS alterations may take a longer time than NFI to recover from damage (Jardim et al. 2007). A high prevalence of peripheral autonomic dysfunction, ranging from 43% to 62%, has been observed in

newly diagnosed leprosy patients (Abbot et Inhibitors,research,lifescience,medical al. 1996; Illarramendi et al. 2005). In the present study, however, a lower prevalence of autonomic dysfunction was seen. This difference may be explained by the inclusion of SVMR and SSR evaluations of the lower extremities in previous studies (Abbot et al. 1996; Wilder-Smith and Wilder-Smith 1996). Again, in the present study, SSR and SVMR were more efficient than the clinical examination at detecting small fiber neuropathy. In addition, Inhibitors,research,lifescience,medical both tests managed to detect almost all clinical Inhibitors,research,lifescience,medical SNF dysfunctions. A clear recovery of autonomic function was observed during follow-up, both clinically and in the SSR and SVMR evaluations. Although both tests evaluate the sympathetic function, the reflex pathways are different (Low et al. 1983; Shahani et al. 1984), which may be responsible for the higher improvement rate observed in SSR as compared to SVMR. Moreover, SVMR impairment, while strongly associated to leprosy reaction (Illarramendi et al. 2005), has been shown to recover after steroid therapy (Wilder-Smith and Wilder-Smith 1997). Consistent with

previous findings, SNF was more frequent than LNF impairment, confirming that, in leprosy, Inhibitors,research,lifescience,medical small and unmyelinated nerve fiber involvement is more extensive than LNF involvement (Dastur et al. 1973). Furthermore, the prevalence of sensory impairment was higher than the incidence of motor dysfunction, also in conformity with other studies (Solomon Dacomitinib et al. 1998; Jardim et al. 2003). The dissociation between SNF and LNF impairment is explained by the fact that, in leprosy, the nerve fascicles are unevenly impaired. Nerve fiber involvement is a complex phenomenon with the simultaneous presence of segmental de- and remyelination concomitant with CP-868596 Wallerian degeneration of preferentially small myelinated fibers (Gibbels et al. 1988). In this study, demyelinating lesions were more frequently observed in motor nerves, although previous studies (van Brakel et al.