Types of Leprosy
There are several different types of HD and each has several names depending on the institution classifying the disease. Ridley Jopline, ICD-10, MeSH and the World Health Organization (WHO) all have different systems of classification but they do parallel each other.
• Paucibacillary (WHO) also know as TT or BT by Ridley-Jopling or A30.1 and A30.2 (ICD-10) and Tuberculoid(MeSH) damages peripheral nerves.
• Mutlibacillary (WHO) or BB (Ridley-Jopling), A30.3(ICD-10) or Borderline (MeSH) is the most common form characterized by numerous skin lesions that can cover one whole limb.
• Multibacillary(WHO), or BL and LL (Ridley-Jopling), A30.4 and A30.5(ICD-10) or Lepromatous (MeSH) manifests as symmetrical lesions and usually involves the mucosa of the nose.
• There are other types of HD including Tuberculoid, Borderline tuberculoid, borderline, borderline lepromatous, lepromatous, histoid leprosy and diffuse leprosy of Lucio and Latapi.
• The term Hansen's disease well commonly used to refer to leprosy is actually a manifestation of the disease without skin lesions. In this type of leprosy only the nerves are involved.