Climate Change and Emerging Infectious Diseases: Investigating the Influence on Transmission Dynamics of Vector-Borne Diseases

Abstract

Background: Climate change significantly affects the transmission dynamics of vector-borne diseases by altering temperature and rainfall patterns, thus creating favorable conditions for vectors. Objective: This study aims to examine the impact of climate change on the incidence of vector-borne diseases, focusing on temperature and rainfall patterns in Dhaka. Method: A cross-sectional study was conducted from February to November 2023 at Shaheed Monsur Ali Medical College and Hospital, Uttara, Dhaka. A total of 125 patients diagnosed with dengue, malaria, and chikungunya were analyzed. Data on patient demographics, disease occurrence, and climate variables (temperature and rainfall) were collected. Regression analysis evaluated the relationship between climate factors and disease incidence. Results: Out of 125 patients, 69 (55%) had dengue, 31 (25%) had malaria, and 25 (20%) had chikungunya. Dengue cases peaked during the monsoon season (July to September), with a 35% increase compared to the dry season. A 1°C rise in temperature correlated with a 12% rise in disease incidence, while a 50 mm increase in rainfall resulted in a 15% increase in cases. Conclusion: The study confirms that rising temperatures and increased rainfall due to climate change are critical drivers of vector-borne disease transmission in Dhaka, necessitating targeted public health measures.