ERAP: West Nile Virus

Cow calves were infected with Japanese encephalitis virus (JEV) by parenteral inoculation. One batch was reinfected with JEV, followed by West Nile virus (WNV), while another batch was reinfected directly with WNV. No viraemia due to either JEV or WNV was demonstrated in any of the calves. Culex tritaeniorhynchus mosquitoes fed on 4 of the calves infected with JEV during the first 10 d had no detectable virus, nor did they transmit the virus by bite to susceptible baby chickens. In another experiment, calves did not develop viraemia after infected C. tritaeniorhynchus mosquitoes were allowed to feed on them. Neutralizing and/or haemagglutination-inhibiting antibodies against JEV were demonstrated in 6 of the 11 calves, which explains th high proportion of JE seropositives among cattle in India. All the 5 calves that were infected with WNV subsequent to JEV developed neutralizing and haemagglutination-inhibiting antibodies against WNV also. The study indicates that cattle do not play a role in the maintenance of JEV in nature. Authors are with the National Institute of Virology, Puna, India. International Conference on Emerging Infectious Diseases. July 16-19, 2000. Center for Disease Control. Alanta, Georgia. Summary: Over 2000 public health professionals in many areas of specialty met in Atlanta in mid-July for the International Conference on Emerging Infectious Diseases. The program included plenary sessions and symposia with invited speakers, presentations on emerging infections, and oral poster presentations. Major topics included current work on surveillance, epidemiology, research, communication and training, bioterrorism, and prevention and control of emerging infectious diseases, both in the United States and abroad The Proceedings of the ICEID Conference will be published (electronically and in print) in a special issue of the Emerging Infectious Diseases Journal. Selected sessions are now available online via the conference homepage, http://www.cdc.gov/ICEID. James, Maurice T. and Robert F. Harwood. 1969. Herm's Medical Entomology The Macmillan Company: London. 484 pages. Jensen, T., R. Lampman, M. C. Slamecka and R. J. Novak. 2000. Field Efficacy of Commercial Antimosquito Products in Illinois. Journal of the American Mosquito Control Association 16(2):148-152. Abstract: We evaluated the efficacy of commerical antimosquito products in field trials in Illinois in June 1998 by comparing mosquito landing rates. Products tested were a sonic mosquito repeller, an insect killing grid using What's Going on with the WEST NILE VIRUS We evaluated the efficacy of commerical antimosquito products in field trials in Illinois in June 1998 by comparing mosquito landing rates. Products tested were a sonic mosquito repeller, an insect killing grid using What's Going on with the WEST NILE VIRUS Bibliography of Scientific Literature (I-L)