Biken Journal

Biken Journal

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But after the 6th passage in chick embryos (i.e. ME6), the optimum temperature changed giving 1.25 log InD50/0.1 ml at 30AdC and 2.0 log InD50/0.1 ml at 35AdC, and the difference ... 4) and the virulence in vivo, namely the grade of attenuation.

Title:Biken Journal
Publisher: - 1968


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