What causes leprosy, and how does it spread?

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Leprosy is caused by the bacterium Mycobacterium leprae and spreads through airborne droplets.

Leprosy, also known as Hansen's Disease, is an infectious illness caused by the bacterium mycobacterium leprae. Transmission occurs when untreated patients release airborne droplets containing the bacteria through actions such as coughing, sneezing, or talking. This mode of spread highlights the importance of consistent treatment for affected individuals to prevent further transmission within communities.
Transmission Pathways and Bacterial Agent

The causative agent of leprosy is identified as mycobacterium leprae, a specific type of bacteria. This bacterium is responsible for the disease's infectious nature. The primary method of transmission involves airborne droplets expelled by individuals who are actively infected and have not yet commenced treatment. These droplets can then be inhaled by others, leading to infection.
Symptoms and Untreated Progression

Common indicators of leprosy include the appearance of reddish or white skin patches that are typically non-itchy. A significant characteristic accompanying these patches is a loss of sensation in the affected area. If left untreated, the disease can progress to cause more severe complications, such as nerve damage, muscle weakness, and paralysis of the facial nerves.
Risk Factors and Preventative Measures for Close Contacts

Individuals who are family members or have close contact with diagnosed leprosy patients are at a heightened risk of contracting the disease. Consequently, early detection and screening of these close contacts are crucial steps in preventing the wider spread of leprosy within the population. The Ministry of Health employs strategies such as providing Single Dose Rifampicin (SDR) to eligible close contacts to mitigate their risk of infection.

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What causes leprosy, and how does it spread?

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