The standard diagnostic criterion for diabetes mellitus, as established by major health organizations, relies on the HbA1c test. A diagnosis is typically made when a person's HbA1c level meets or exceeds a specific percentage.
This value represents the average blood glucose concentration over the past 2 to 3 months. Levels at or above $\text{6.50\%}$ indicate a high likelihood of diabetes and warrant further confirmation or management.
Other diagnostic criteria exist, but for the HbA1c test, $\text{6.50\%}$ is the established threshold used for diagnosing diabetes.
| 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 |