Learn About Hansens Disease

Monday, October 17th 2016. | Disease

The initial tropism of M. leprae for peripheral nerves from large nerve trunks to microscopic dermal nerves and certain immunologically mediated reactional states would be the major reasons of morbidity in leprosy.

Today, with early diagnosis and also the institution of appropriate and efficient antimicrobial therapy, patients may lead productive lives locally, and penile deformation along with other visible manifestations can largely be avoided.



M. leprae is definitely an obligate intra cellular bacillus that’s limited to humans, armadillos in a few locales, and peat moss moss.

The organism is acidity-fast, exact microscopically using their company mycobacteria .

M. leprae develops very best in cooler tissue your skin, peripheral nerves, anterior chamber from the eye, upper respiratory system, and testes, sparing warmer areas of your skin the axilla, groin, scalp, and midline from the back.


The worldwide prevalence of leprosy is tough to evaluate. Estimations vary from .six to eight million affected people.

Leprosy is connected with poverty and rural residence. It seems to not be connected with AIDS, possibly due to leprosy’s lengthy incubation period.


The path of transmission of leprosy remains uncertain, and transmission routes may actually be multiple.

Nasal droplet infection, connection with infected soil, as well as insect vectors happen to be considered the best candidates.

Clinical features:

Lepra responses comprise several common immunologically mediated inflammatory claims that cause considerable morbidity.

. Type 1 Lepra Responses

Type 1 lepra responses exist in nearly half of patients with borderline types of leprosy although not in patients with pure lepromatous disease. Manifestations include classic indications of inflammation within formerly involved macules, papules, and plaques and fever. The nerve trunk most generally involved with this method may be the ulnar nerve in the elbow, which can be painful and exquisitely tender.

Type 2 Lepra Responses: Erythema Nodosum Leprosum

Erythema nodosum leprosum happens solely in patients close to the lepromatous finish from the leprosy spectrum affecting nearly 50% of the group.

The most typical options that come with ENL are crops of painful erythematous papules that resolve automatically inside a couple of days to some week but might recur malaise and fever that may be profound.

However, patients might also experience signs and symptoms of neuritis, lymphadenitis, uveitis, orchitis, and glomerulonephritis and could develop anemia, leukocytosis, and abnormal liver function tests .


The Limbs

Complications from the limbs in leprosy people are mainly due to neuropathy resulting in insensitivity and myopathy.

Insensitivity affects fine touch, discomfort, as well as heat receptors but generally spares position and vibration appreciation.

Probably the most generally affected nerve trunk may be the ulnar nerve in the elbow, whose participation leads to clawing from the 4th and fifth fingers, lack of dorsal interosseous musculature within the affected hands, and lack of sensation during these distributions.

Median nerve participation in leprosy impairs thumb opposition and grasp radial nerve disorder, although rare in leprosy, results in wristdrop.

The Nose

In lepromatous leprosy, bacillary invasion from the nasal mucosa can lead to chronic nasal congestion and epistaxis .

Lengthy-untreated LL leprosy may further lead to destruction from the nasal cartilage, with consequent saddle-nose deformity or anosmia

The Attention

Because of cranial nerve palsies, lagophthalmos and corneal insensitivity may complicate leprosy, leading to trauma, secondary infection, and corneal ulcerations and opacities.

The Testes

M. leprae invades the testes, while ENL could cause orchitis, severe testicular disorder, by having an elevation of luteinizing and follicle-stimulating the body’s hormones, decreased testosterone, and aspermia or hypospermia


Secondary amyloidosis is really a complication of LL leprosy and ENL that’s experienced rarely within the antibiotic era. This complication may lead to irregularities of hepatic especially kidney function.

Nerve Abscesses

Patients with assorted types of leprosy, but particularly individuals using the BT form, may develop abscesses of nerves by having an adjacent cellulitic appearance of your skin.


Leprosy most generally presents with characteristic lesions on the skin and skin histopathology.

Diagnosing ought to be confirmed by histopathology.

Biopsies of ordinary-showing up skin will also be generally diagnostic.

Tuberculoid lesions might not

(1) appear typical

(2) be hypesthetic

(3) contain granulomas only nonspecific lymphocytic infiltrates.

IgM antibodies to PGL-1 are located in 95% of untreated lepromatous leprosy patients

Differential diagnosis



Lupus vulgaris






Granuloma annulare

Many other disorders causing hypo pigmentation (pityriasis alba, tinea, and vitiligo).