Development of an attenuated strain of chikungunya virus for use in vaccine production

N H LevittH W Lupton


An attenuated chikungunya (CHIK) virus clone was developed for production of a live vaccine for human use. CHIK strain 15561 was subjected to 18 plaque-to-plaque passages in MRC-5 cultures before CHIK 181/clone 25 was selected as vaccine seed based on homogeneous small plaque size, suckling mouse avirulence, reduced monkey viraemia and genetic stability. Oligonucleotide mapping demonstrated differences between parent and clone. Vaccine (pilot-lot production) elicited neutralizing antibody and protected mice and rhesus monkeys against challenge. After challenge, viraemias were absent in vaccinated monkeys. Vaccine was then produced and tested in accordance with governmental regulatory requirements of human use.


Jan 1, 1957·Transactions of the New York Academy of Sciences·J CASALS


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Related Concepts

Animals, Suckling
Antibodies, Viral
Chikungunya virus
Cytopathogenic Effect, Viral
Macaca mulatta
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