According to WHO, the prevalence of leprosy is a major public health problem when the incidence is more than:
**Core Concept**
Leprosy, also known as Hansen's disease, is a chronic bacterial infection caused by *Mycobacterium leprae*. The World Health Organization (WHO) monitors the global prevalence and incidence of leprosy to determine its impact on public health.
**Why the Correct Answer is Right**
The WHO defines a country's leprosy situation as a major public health problem when the annual incidence of new cases is greater than 1 per 10,000 population. This threshold indicates that leprosy is a significant health concern, warranting attention and resources for prevention, diagnosis, and treatment. The incidence of leprosy is used as a measure of the disease's burden and its potential impact on a population.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not align with the WHO's definition of a major public health problem.
**Option B:** This option is incorrect because it is lower than the WHO's established threshold for a major public health problem.
**Option C:** This option is incorrect because it is higher than the WHO's established threshold for a major public health problem.
**Clinical Pearl / High-Yield Fact**
The WHO's definition of a major public health problem for leprosy serves as a benchmark for countries to assess their disease burden and allocate resources effectively. This threshold is critical for ensuring that leprosy prevention and control programs are implemented and sustained.
**Correct Answer:** 1 per 10,000 population.