Heat inactivation of serotype 1 infectious bursal disease virus.
Heat inactivation curves for infectious bursal disease virus serotype 1 (IBDV) strain 52/70 in bursal homogenate supernatant were constructed for 70 degrees C, 75 degrees C and 80 degrees C. Biphasic, multiple kinetics curves were produced with an initial rapid drop in infectivity followed by a more gradual decline. In this second phase the approximate times taken to reduce the infectivity by 1 log(10) at each temperature were: 70 degrees C (18.8 min), 75 degrees C (11.4 min) and 80 degrees C (3.0 min), confirming the heat resistance of this virus.
Alexander
D J
DJ
Central Veterinary Laboratory (Weybridge), Addlestone, Surrey, UK.
Chettle
N J
NJ