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.