Autochthonous Leprosy without Armadillo Exposure, Eastern United States

Area of Science:

• Infectious Diseases
• Epidemiology
• Public Health

Background:

• Autochthonous leprosy, or leprosy originating within a region, has been documented in the United States.
• Recent cases have been reported in New York City, Georgia, and Florida.
• Transmission routes for these cases are not always clear, with some occurring without known exposure to armadillos, a known vector.

Purpose of the Study:

• To investigate potential causes of autochthonous leprosy in the US.
• To evaluate the role of international migration in leprosy transmission.
• To understand the epidemiology of leprosy in non-endemic regions.

Main Methods:

• Review of reported autochthonous leprosy cases in the US.
• Analysis of geographical distribution and potential exposure factors.
• Consideration of epidemiological data related to international travel and migration patterns.

Main Results:

• Leprosy cases have been identified in areas without endemic armadillo populations, such as New York City.
• Cases in Georgia and Florida have been linked to armadillos, but some occurred without clear exposure.
• International migration emerges as a plausible contributing factor to autochthonous leprosy.

Conclusions:

• The presence of autochthonous leprosy in the US, independent of armadillo exposure, indicates other significant transmission pathways.
• International migration should be seriously considered as a primary driver for leprosy cases in non-endemic regions.
• Public health strategies for leprosy control must account for global population movements.