Volume 37, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Seventeen strains of mosquitoes belonging to 12 species in the subgroup were tested for an ability to transmit one or more dengue virus serotype(s) vertically. Strains of virus employed for dengue types 1, 2, 3, and 4 were from Fiji, Bangkok, Burma, and Medan, respectively. After parental females were infected by intrathoracic inoculation, F larval and pupal progeny were tested for the presence of virus by inoculating aliquots of triturated suspensions into mosquitoes. Dengue type 1 was transmitted vertically by 11 strains of mosquitoes representing 8 species with the highest filial infection rates observed for (1.2%). Vertical transmission of the other dengue virus serotypes was observed for fewer species of mosquitoes, however the filial infection rates of those demonstrating vertical transmission were between 1%–2% for types 2 and 3, and about 0.5% for type 4. Tests with the progeny of individual and infected with dengue virus types 1 and 3, respectively, showed that approximately ≥50% of the parental females transmitted virus to their progeny. Highest filial infection rates were 6.7% for and 4.6% for .


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