Experimental Vertical Transmission of Japanese Encephalitis Virus by Culex Tritaeniorhynchus and Other Mosquitoes
Abstract
Vertical transmission of Japanese encephalitis virus to the F1 adult stage was demonstrated in Culex tritaeniorhynchus, Cx. annuals, Cx. quinquefasciatus, and Armigeres subalbatus.Transmission to the F1 larval stage was demonstrated in Cx. pipiens, Aedes vexans, Ae. alacasidi, and A. flavus. In Cx. tritaeniorhynchus, vertical transmission rates (the percentage of parent females transmitting to progeny) varied (12-100%). Filial infection rates (the percentage of progeny infected) for a given mosquito virus combination were markedly affected by the interval of time between parental infection and oviposition, suggesting that vertical infection was not transovirial in nature but occured at oviposition. Filial infection rates for Cx. tritaeniorhynchus also varied widely by family and, as measured in Fl larvae, rates in excess of 20% were observed in family. Filial infection rates in Cx. tritaeniorhynchus F1 adults were about 4 times lower than those in larvae. Japanese encephalitis virus was sexually transmitted from male to female Cx. tritaeniorhynchus. Keywords: Disease vectors; Japanese encephalitis; Culex tritaeniorhynchus; Vertical disease transmission, Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1989
- Accession Number
- ADA212949
Entities
People
- Donald A. Shroyer
- Jih-ching Lien
- Leon Rosen
- Liang-chen Lu
- Richard H. Baker
Organizations
- Naval Medical Research Center