Comparative Study of Leprom114 Reaction in Indeterminate Leprosy and Controls

Area of Science:

• Immunology
• Dermatology
• Infectious Diseases

Background:

• Leprosy diagnosis relies on clinical, microbiological, and immunological parameters.
• Indeterminate leprosy (IL) represents an early, often challenging-to-classify stage of the disease.
• The Lepromin test (LT) assesses cell-mediated immunity against Mycobacterium leprae antigens.

Purpose of the Study:

• To evaluate the diagnostic utility of the Lepromin test in indeterminate leprosy.
• To correlate Lepromin test results with histopathological findings in IL cases.

Main Methods:

• Lepromin test performed on 100 indeterminate leprosy patients and 100 controls.
• Age and sex matching for patient and control groups.
• Histopathological examination of skin biopsies from Lepromin-positive IL cases.

Main Results:

• 98% of indeterminate leprosy cases tested negative for the Lepromin test.
• 80% of control subjects showed a positive Lepromin test reaction.
• Lepromin-positive indeterminate leprosy patients displayed tuberculoid histopathology.

Conclusions:

• The Lepromin test demonstrates low sensitivity for indeterminate leprosy.
• A positive Lepromin test in IL may suggest an underlying tuberculoid immune response despite indeterminate clinical presentation.
• No correlation was observed between Fernandez and Mitsuda reactions in this cohort.