Review Article
Leprosy: A Review of Epidemiology, Clinical Diagnosis, and Management
Table 1
Comparison of classifications of leprosy proposed by World Health Organization and Ridley–Jopling.
| Classification | Brief description |
| WHO (1987) | Ridley–Jopling [21] | Number of skin lesions | Neurological damage | Bacteriology: microscopic criteria | Paucibacillary | | | | | 1 skin lesion | Tuberculoid (TT) | Unique and infiltrated lesions | No neurological damage | Negative | 2–5 skin lesions | Borderline tuberculoid (BT) | Stasis and hypopigmented lesions few or many lesions of varying size | Little neurological damage little or no neurological damage | Negative negative/1+ | Multibacillary | | | | | >5 lesions | Borderline borderline (BB) | Multiple lesions and maculopapular | Late thickening of the nerve | ≧2+ | | Borderline lepromatous (BL) | Multiple lesions, maculopapular, and nodules | Late thickening of the nerve | ≧2+ | | Lepromatous (LL) | Multiple lesions, maculopapular, and nodules | Late thickening of the nerve | ≧2+ |
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Note. 1+ or 2+: microscopic criteria when acid-fast bacilli were observed using Ziehl–Neelsen stain; negative, no acid-fast bacilli observed; BL, borderline lepromatous; BT, borderline tuberculoid; IND, indeterminate; LL, lepromatous leprosy; TT, tuberculoid leprosy.
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