THE MODIFIED ZIEHL-NEELSEN (ZN) STAIN IS A SPECIAL LABORATORY TECHNIQUE USED TO IDENTIFY ACID-FAST BACTERIA, SPECIFICALLY MYCOBACTERIUM LEPRAE, THE BACTERIA THAT CAUSES LEPROSY. A POSITIVE RESULT PROVIDES A RAPID AND DEFINITIVE DIAGNOSIS OF LEPROSY, ALLOWING FOR EARLY TREATMENT AND PREVENTION OF NERVE DAMAGE AND DISABILITY.