Vector-borne disease is an infection, which is transmitted to humans or other animals by an insect or other arthropod. Some species of mosquitoes are able to transmit viruses, rickettsiae, bacteria, Japanese Encephalitis or parasites to humans. Ariyalur is one of the most polluted towns in Tamil Nadu. Due to its mining activities nearby areas of this region forms a major Lime stone lakes surround this region and many of them are abandoned filled with stagnant and waste-water. The town has the highest stray pig population and the field investigation in this region clearly depicts that it has no proper drainage system in the town. The town has always been an endemic zone of many infectious diseases due to its improper environmental conditions. The most important disease very often affects this town is the `Japanese Encephalitis’, which is otherwise known as `Brain Fever’ that affect the children within the age group of 6. During and aftermath of the seasonal rainfall this district is worst affected to many infectious diseases. Even in some of the mixed residential (built and huts) complexes do have 10 to 20 stray pigs and keeping them as a domestic animal. It is evident from the above fact this zone is an epidemic zone for Japanese Encephalitis and it is easy to evaluate the nature of physical, spatial, ecological, environmental, social and economic condition in which the people survive in this town and district and disturbing the balance between the host and environment relationship. When the balance is not maintained the infectious diseases finds the places of most adverse environmental condition zones.
Prof. Dr. Bilal BİLGİN