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Introduction: Leprosy is a public health problem in Brazil where 31,044 new cases were detected in 2013. Rio Grande do Norte is a small Brazilian state with a rate of leprosy lower than other areas in the same region, for unknown reasons., Objectives: We present here a review based on the analysis of a database of registered leprosy cases in Rio Grande do Norte state, comparing leprosy's geographic distribution among municipalities with local socio-economic and public health indicators and with historical documents about human migration in this Brazilian region., Results: The current distribution of leprosy in Rio Grande do Norte did not show correlation with socio-economic or public health indicators at the municipal level, but it appears related to economically emerging municipalities 100 years ago, with spread facilitated by railroads and train stations. Drought-related migratory movements which occurred from this state to leprosy endemic areas within the same period may be involved in the introduction of leprosy and with its present distribution within Rio Grande do Norte., Conclusions: Leprosy may disseminate slowly, over many decades in certain circumstances, such as in small cities with few cases. This is a very unusual situation currently and a unique opportunity for epidemiologic studies of leprosy as an emerging disease.

Objectives: The objective was to characterise and identify potential risk factors for intolerance to multi-drug leprosy therapy (MDT) which prompted a medication change in a leprosy referral centre in northeastern Brazil., Design: A retrospective chart review of leprosy patients treated at a state referral centre for leprosy in Natal, Rio Grande do Norte, Brazil was completed. Chart review focus was on adverse effects necessitating modification of MDT regimen., Results: Six hundred and twelve records were reviewed with detection of 91 (14.8%) adverse effects with associated change in MDT regimen. The most common recorded causes of medication intolerance were anemia (8.7%), headache (4.2%), cyanosis (1.8%), and gastrointestinal symptoms (1-6%). Both female gender (OR = 2.63) and age less than 42 years old (OR = 2.7) remained risk factors for MDT intolerance in a multivariate model including gender, age, and WHO regimen type. With intolerance due to anemia as the outcome, female gender (OR = 2.36) and age less than 42 years (OR = 1.86) were associated., Conclusions: In this study, female gender and younger age were associated with greater risk of medication intolerance and medication intolerance related to anemia. These findings have important operational implications for drug intolerance monitoring during therapy for leprosy.

There are diverse skin manifestations of both leprosy and syphilis. These diseases can appear similar to many other dermatologic conditions as well as to systemic diseases with dermatologic signs. Nodular syphilis is an uncommon type of secondary syphilis. We present here a person from a leprosy-endemic area with diffuse nodular skin lesions of secondary syphilis who was initially suspected of having lepromatous leprosy.