Dengue is one of the major public health problems worldwide, transmitted mainly by Aedes aegypti and Ae. albopictus mosquitoes. Rapid urbanisation and industrialisation have led to an increase in vector population in Northeastern states of India. In 2013, Guwahati, the capital city of Assam, India experienced an outbreak of dengue. This study was undertaken with an objective to determine infection rates of dengue viruses (DENV) in both the established vectors present in this region.