Many of these vectors are blood or sap sucking, which ingest disease-producing microorganisms during a meal from an infected host and later inject it into a new host during their subsequent meal. The common vectors include mosquitoes, bed bugs, ticks, flies, sand flies, fleas, triatomine bugs, tsetse flies, black flies, lice, cockroaches, some freshwater aquatic snails, dogs and rodents. Among these animals, Arthropods are predominant vectors that mostly transmit arbovirus (arthropod borne viruses) to their hosts such as plants and animals.