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Army study: DNA vaccine and duck eggs protect against hantavirus disease
Date:5/23/2012

ient.

Next, they purified an antibody called IgY from the yolks of the duck eggs. This purified IgY, as well as a similar version produced in duck eggs, was capable of neutralizing Andes virus when tested in cell culture. More importantly, it also protected Syrian hamsters from lethal HPSeven when administered as a single injection several days after the hamsters had been exposed to a lethal dose of virus.

The work demonstrates the feasibility of using DNA vaccine technology, coupled with the duck/egg system, to manufacture a product that could supplement or replace FFP. Furthermore, the new approach can be scaled as needed and eliminates the necessity of using blood products from HPS survivors, which may be in limited supply.

According to Hooper, another advantage of this technique is that duck IgY naturally loses a part of the antibody that has been associated with "serum sickness" when animal antibodies have been used in humans, making the product potentially less reactogenic.

"This antiviral product, if fully developed and manufactured, has the potential to be used in future outbreak situations," Hooper said. "It also could be used to treat health care workers and others who have close contact with HPS patients."

In addition, the authors suggest, the flexibility of the DNA vaccine/duck egg system could be applied to the production of antibodies against other infectious agents and toxins.


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Contact: Caree Vander Linden
caree.vanderlinden@us.army.mil
301-619-2285
US Army Medical Research Institute of Infectious Diseases
Source:Eurekalert

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