Abstract
From its East Africa origin, leprosy has afflicted humans since ancient times. The tide turned against the disease from the 1980s when effective multidrug therapy was introduced worldwide. By 2005, all countries in sub-Saharan Africa had attained the WHO elimination target of prevalence less than 1 per 10,000 population. Africa accounts for 9 % of global leprosy prevalence and new case detection with a worrying number of new cases having significant disability at diagnosis. Public stigma has also contributed to the persistence of segregated settlements for leprosy sufferers, long after cure. No case in sub-Saharan Africa has been linked to the recently discovered Mycobacterium lepromatosis. Leprosy spread is believed to be by droplet and skin transmission with growing evidence for zoonotic spread from infected armadillos, a species not found outside the Americas. The presentation of leprosy in sub-Saharan Africa is as elsewhere, varying between two polar states of tuberculoid and lepromatous leprosy and modified by complications including acute reactions.
Clinical diagnosis and classification of leprosy at present are most amenable for treatment purposes, with the continuous supply of effective MDT being the backbone of leprosy control activities. There is a greater push towards reducing the disability burden with improvement of the generally weak African health care systems within which leprosy services are provided and increased involvement of sufferers and the community being key strategies. A fixed-duration course of rifampicin and dapsone, with addition of clofazimine in multibacillary disease, remains the mainstay of treatment.
Leprosy control activities are now suffering from reduced attention on both global and subregional scales, and the knowledge of front-line health care workers regarding leprosy is dwindling. With leprosy likely to remain with us for the foreseeable future, more research and political will are required to sustain the gains and possibly accelerate us to true elimination.
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Quao, B.O., Amankrah-Otabir, E. (2016). Leprosy. In: Gyapong, J., Boatin, B. (eds) Neglected Tropical Diseases - Sub-Saharan Africa. Neglected Tropical Diseases. Springer, Cham. https://doi.org/10.1007/978-3-319-25471-5_6
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