Nilphamari

Researchers are investigating the prevention of leprosy transmission by focusing on contacts of individuals infected with Mycobacterium leprae, the bacteria that causes leprosy. Since contact with infected individuals increases the risk of developing leprosy, early detection of asymptomatic infection is essential for deciding who should receive treatment before symptoms appear. This study evaluates the effect of a preventive antibiotic treatment, single dose rifampicin (SDR), on the rate of M. leprae infection using a novel low-complexity diagnostic test that measures immune markers in blood samples. Previous work in Bangladesh demonstrated the usefulness of combining vaccination and SDR, along with immune profiling, to identify infected individuals at risk of disease progression. The study involves administering SDR as a post-exposure prophylaxis to contacts of newly diagnosed multibacillary leprosy patients. The novel diagnostic test, based on up-converting particles lateral flow assay (UCP-LFA), detects both cellular and humoral immune markers specific to M. leprae infection. Blood samples from participants are collected and analyzed at 2 weeks, 4 weeks, and 6 months after SDR treatment to monitor changes in serum protein levels. This approach aims to assess the effectiveness of prophylactic interventions in reducing infection rates and is designed to be practical for use in field settings due to its simple finger-stick blood sampling. Participants in the study include household members, neighbors, and others living in close contact with leprosy patients who meet specific inclusion criteria. They provide informed consent and undergo regular blood sampling for immune analysis. Researchers measure changes in host serum protein levels to evaluate infection status over time. The study also monitors safety and adherence to treatment through ongoing contact and examinations. This research helps refine strategies for leprosy control by combining preventive treatment with innovative, easy-to-use diagnostic tools, potentially allowing for earlier intervention and reduced disease spread.