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Highly pathogenic avian Influenza (HPAI) is an important zoonotic disease and is becoming a great threat to poultry industry. India has experienced continual outbreaks of H5N1 HPAI virus since February, 2006 especially in Eastern India. Survivability in poultry faeces is an important determinant in evaluating the persistence of the virus in the poultry sheds and their vicinity. In this paper, survivability of Indian H5N1 HPAI virus in dry and wet poultry faeces at 42, 37, 24 and 4 °C, respectively is reported. The effect of different temperatures was determined by linear regression model and defined in terms of linear equation. The virus survived up to 18 h at 42 °C, 24 h at 37 °C, 5 days at 24 °C and 8 weeks at 4 °C in dry and wet faeces, respectively. The coefficients of determination (R(2)) values for dry and wet faeces revealed that the difference in viral persistence in dry and wet faeces at all temperatures was not very marked. Results of the present study indicated that H5N1 HPAI virus may remain viable for extended periods of time in faeces at low temperatures and may act as a long term source of influenza virus in the environment.

Survivability of Highly Pathogenic Avian Influenza H5N1 Virus in Poultry Faeces at Different Temperatures