Systematic Veterinary Virology

RESISTANCE

• The virus are highly resistant to low temperatures but inactivated by 56°C/70 min or by 60°C/20 min. The viruses are inactivated by pH <3.9 or >11.5. The viruses are also inactivated by 8/1,000 sodium hydroxide (30 min), hypochlorites - 2.3% chlorine (30 min), 3/1,000 formalin (30 min), 3% ortho-phenylphenol (30 min) and iodine compounds. They remain viable for long periods in blood, faeces and tissues.