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The freeze-drying of Cowdria ruminantium
J L du Plessis1, L van Gas, F J Labuschagne
1Veterinary Research Institute, Onderstepoort.
The Onderstepoort Journal of Veterinary Research
|September 1, 1990
Abstract:
Lyophilized tissues of mice and blood of sheep, infected with either the Kümm, the Welgevonden or the Ball 3 stock of Cowdria ruminantium, remain infective to mice and sheep after storage at 4 degree C for 90 days. Freeze-dried tissues stored at -18 degrees C and -28 degrees C are still infective after 6 months and 2 years, respectively.