Abstract:
Lyophilized tissues of mice and blood of sheep, infected with either the Kumm, the Welgevonden or the Ball 3 stock of Cowdria ruminantium, remain infective to mice and sheep after storage at 4ºC for
90 days. Freeze-dried tissues stored at -18 ºC and -28 ºC are still infective after 6 months and 2 years respectively.
