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Formaldehyde-inactivated Japanese encephalitis virus vaccine developed.

Vaccine Weekly

| December 01, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 DEC 1 - (NewsRx.com & NewsRx.net) -- A formaldehyde-inactivated Indian strain of Japanese encephalitis virus grown in Vero cells

"P20778, an Indian strain of Japanese encephalitis virus (JEV) obtained from Vellore in the Southern India, was grown in Vero cells cultured on microcarriers in a spinner flask. The virus was formalin-inactivated and its immunogenicity and protective efficacy in mice were tested in comparison with a commercially available vaccine. Our studies indicated that formalin-inactivated JEV P20778 induced high levels of protective immunity in mice," researchers in India report.

"Virus inactivation with formalin at 22 degrees C, which required shorter incubation period, was found to be as good or better to virus inactivation at 4 degrees C for generating high titers of anti-JEV antibodies," said Mohan Babu Appaiahgari and Sudhanshu Vrati at the National Institute of Immunology in New Delhi. "Similarly, the 22 degree C-inactivated virus generated JEV neutralizing antibody titers as good or higher than those induced by the 4 degree C-inactivated virus. Thus, for the ...

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