Update on Clinical and Epidemiological Features of Viral Hepatitis A

HAV is a very resistant virus in the environment because of by the absence of envelop. The virus is resistant against denaturation by drying, temperature as high as 56°C and as low as -20°C and acid at pH 3.0 [3,5,6]. The virus can also survive in used water for weeks at 20 °C temperature especially if the humidity is low. The virus is neutralized after heating at 70 °C for 4 min and inactivated by radiation, by the glutaraldehyde 2%, formaldehyde and bleach reconstituted and diluted at 1/5 [5,7].