Systematic Veterinary Virology

RESISTANCE

• The viruses are susceptible to 56°C/2 hours; 65°C/30 min. They are also susceptible to highly alkaline or acid pH. They are sensitive to ether (20%), chloroform, and formalin (1%) and are inactivated by phenol (2%) in 15 min. They can survive for many years in dried scabs at ambient temperatures. Virus remains viable in wool for 2 months and in premises for as long as 6 months