Abstract
Background Since leprosy was eliminated as a public health problem in 2000, trends in case detection have been declining. However, from 2015, case detection in the WHO Eastern Mediterranean (EM) region increased mainly due to reports from Somalia that re-instated the national programme. As Somalia reported 57% of new cases in the EM region in 2021, we reviewed the national control programme activities and the characteristics of reported cases to understand leprosy transmission in the country. Methods From 2012 to 2021, we extracted data from WHO’s Global Health Observatory and the national leprosy control programme’s patient register in Somalia. From 2015 onwards, leprosy cases were detected by the Federal Ministry of Health through mobile teams conducting “skin camps” in 47 districts across seven regions. We analyzed data to describe the overall case detection rate and rates per period, place and person, including severity measured by grade two disability (G2D) and multibacillary (MB) cases. Results The overall case detection rate increased 11-fold between 2012 and 2021, from 6 cases per million in 2012 to 106 cases per million in 2021 in females and from 16 cases per million in 2012 to 132 cases per million in 2021 in males. Case detection among children under 15-years of age also increased from 4 cases per million in 2012 to 13 cases per million in 2021. Initially, the proportion of MB cases and G2D at the time of diagnosis increased from 60% and 11% in 2012 to 87% and 42% in 2015 respectively, when the national programme resumed leprosy control activities. By 2021, the MB proportion decreased to 45% and G2D proportion also decreased to 2%. From 2015 to 2021, four regions in Somalia reported 77% of the new cases and 83% of cases with G2D: Lower Shabelle, Middle Juba, Lower Juba and Middle Shabelle. Conclusion “Skin-camps” for case detection were effective in finding hidden leprosy cases and reducing the delay in diagnosis over time. The constant case detection rate among the female population, equal to the male population, points to sufficient programme reach. However, low disability rates persisted among this population which could be due to continued underlying stigma. Reports of new cases among children suggest ongoing transmission requiring prevention strategies such as single dose rifampicin post-exposure prophylaxis.
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