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Abstract:
Filtration by means of a Diaflo ultrafilter was used to concentrate three 1,000-ml lots and one 3,000-ml lot of tissue culture-grown Rift Valley fever virus. Quantitation of both infectivity and total protein was achieved. Water treatment with continued ultrafiltratin of the virus concentrate provided a final virus product approximately 99.25% free of low-molecular-weight materials originally present in the growth medium.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Pages: |
4 |
| Report Date: |
09 Dec 1970 |
| Report Number: |
0368427 |
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