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Anti-PGL-I IgM positivity.
| Genotype | Number of positive individual | % of positivity |
| MB patients BI 2-6 (n = 33) | 33 | 100.0 |
| Patients BI 0 (n = 27) | 9 | 33.3 |
| Healthy household contacts (n = 250) | 9 | 36.8 |
Anti-PGL-I antibody levels were measured by up-converting phosphor lateral flow assay specific for M. leprae PGL-I IgM antibodies (UCP-LFA) using the Ratio (R) of the Test (T) and flow control (FC) lines as units. Ratios of ≥0.10 were considered positive.
