Exploring the Intricacies of Encephalitis in Mosquito-Borne Diseases through Vector-Host-Pathogen Interactions: A Critical Review

Abstract

Environmental changes, medication resistance and sociodemographic shifts have all contributed to a dramatic increase in vector-borne diseases in the last 40 years, impacting both people and domestic animals. Pandemics like the Dengue fever epidemic that hit Bangladesh in 2023 show how devastating these illnesses may be on a global scale. The authors of this work stress the significance of comprehending vector-host-pathogen pathways via their examination of arboviruses in Asia. The ecology and biology of Culex, Culiseta and Aedes species in connection to Dengue Virus, Japanese Encephalitis (JE), Eastern Equine Encephalitis (EEE) and Western Equine Encephalitis (WEE) are explored in a thorough literature review that utilizes MeSH terminology. Beginning with the Japanese Encephalitis Virus (JEV), this article examines the virus’s transmission from insects to vertebrates and, inadvertently, to humans as a disease. We then go on to dengue encephalitis, breaking its intricate pathophysiology into parts. This includes aspects like immune-mediated consequences, systemic problems and direct invasion. The Aedes mosquito is a key player in the human-mosquito-human cycle that transmits Dengue Virus (DENV) and the extrinsic incubation time impacts outbreaks. Continuing to focus on the neuroinvasive effects on horses and people, we have Eastern Equine Encephalopathy (EEE). The interaction between birds and Culiseta melanura mosquitoes highlights the transmission of the enzootic cycle. At last, we look at Western Equine Encephalitis (WEE), which WEEV causes and how it affects both horses and people. Importantly, Culex species, which include mosquitoes and birds, serve as vectors in the enzootic cycle. Factors including climate change and international travel are included in the study’s conclusion, which emphasizes the significance of continuing research to monitor and reduce the worldwide effect of these arboviruses.