Diseases can affect populations in different ways, often related to where and how often they occur. Public health professionals use specific terms to describe these patterns, especially concerning geographical distribution and population groups.
The question asks for the term that describes a disease specifically confined to particular geographical areas or certain groups of people, plants, or animals. Let's look at the options and definitions:
A disease is considered endemic when it is consistently present but limited to a particular region or population. Think of it as the baseline level of a disease expected in that specific area. The prevalence might change over time, but it doesn't disappear entirely from the location. This matches the description given in the question.
Example: Cholera is endemic in certain regions of India and Bangladesh.
An epidemic occurs when there's a sudden increase in the number of cases of a disease above what is normally expected in that population and area. It's a larger outbreak than usual but typically restricted to a specific locality or region.
Example: A sudden outbreak of measles in a school or city.
A pandemic is a global outbreak. It's an epidemic that has spread across multiple countries or continents, affecting a large number of people worldwide. It signifies a widespread geographical reach.
Example: COVID-19 spread across the globe.
The term endogenic relates to the origin of a condition. It means the cause arises from within the organism or system itself, rather than from external factors. This term describes the source of a condition, not its geographical spread.
Based on the definition focusing on diseases being confined to specific geographical areas and certain populations, the correct term is Endemic.
| List-I (Diseases) | List-II (Vector) |
| A. Schistosomiasis | I. Phlebotomine Sand Fly |
| B. Lymphatic Filariasis | II. Water Snail |
| C. Leishmaniasis | III. Black Fly |
| D. Onchocerciasis | IV. Mosquito |
| List-I (Diseases) | List-II (Mode of Transmission) |
| A. Influenza | I. Air borne |
| B. Cholera | II. Food and water borne |
| C. Malaria | III. Bite of female Aedes mosquitoes |
| D. Dengue | IV. Bite of female Anopheles mosquitoes |