Arboviruses in human disease: An Indian perspective

Abstract

There has been a dramatic increase in the frequency of arboviral disease epidemics among humans and domestic animals worldwide in recent decades. Some of these infections have also undergone significant geographical expansion owing to uncontrolled urbanization leading to changes in vector distribution and/or adaptation of the etiologic agent to more anthropophilic vectors. Arboviral infections such as chikungunya have re-emerged in certain parts of the world, such as India (where chikungunya re-emerged in 2006 after 32 years of quiescence). Existing surveillance systems for arboviral infections in developing countries face several issues, such as being dependent on reporting of loosely defined clinical syndromes and infrequent laboratory confirmation. The recent re-emergence of Zika virus infections and its complications in South America underscore the urgent need for advancements in scientific knowledge on the biology of the arboviral agents and their vectors, innovations concerning diagnostic technologies, vector control measures, and therapeutic approaches. India, a tropical country, harbors an abundance of arthropod vectors capable of hosting and propagating viral infections. These vectors can transmit infections within humans, animals and also across species. This review focuses on viral infections in humans transmitted by arthropod vectors.