Aerodynamic Approaches for the Predition of Spread the HPAI (High Pathogenic Avian Influenza) on Aerosol

HPAI (Highly pathogenic avian influenza) which is a legally designated epidemic disease generally shows rapid spread resulting in high mortality rate as well as severe economic damages. Because Korea is neighbor with China and south-east Asia where HPAI have occurred frequently, there is a high possibility for HPAI outbreak. A prompt treatment against epidemics is most important for minimize of disease spread. The spread of HPAI should be considered by both direct and indirect contact as well as various spread factors including airborne spread. There is high risk of rapid propagation of HPAI via air because most of farms in Korea are collective. Field experiments for the mechanism of disease spread have limitations such as unstable weather condition and difficulties in maintaining experimental conditions. In this study computational fluid dynamics which has been actively used for mass transfer modeling were adapted. Korea has complex terrains and many livestock farms are located in the mountain regions. GIS was also used to estimate spreads of virus attached aerosol by means of designing three dimensional complicated geometry including farm location, road network, and related facilities. This can be used as back data in order to take preventive measures against HPAI occurrence and spread.