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West Nile virus passes from female to eggs, but less so from larvae to adults
Date:3/5/2013

rafts and positive larvae, and one had a positive egg raft and negative larvae. One possible explanation is that larvae may acquire the virus by feeding on infected egg rafts after emerging.

The authors conclude that future studies are needed to explain how WNV is vertically transmitted, if larvae can become infected by feeding on infected eggs, and why the virus seems to be frequently degraded during metamorphosis.

"This could be used as a tool for identifying foci of virus transmission during the WNV season," said Brittany Nelms, one of the authors of the study. "Although we found that the virus is lost from the larval to the adult stage, we can still identify areas where vertical transmission is taking place in nature."


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Contact: Brittany M. Nelms
bnelms@lcvcd.org
707-263-4770
Entomological Society of America
Source:Eurekalert

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