Napawan Bunpapong . Infection of avian influenza virus (H5N1) isolated in Thailand using tracheal culture. Master's Degree(Veterinary Public Health). Chulalongkorn University. Center of Academic Resources. : Chulalongkorn University, 2008.
Infection of avian influenza virus (H5N1) isolated in Thailand using tracheal culture
Abstract:
Avian influenza (AI) is caused by influenza type A (H5N1) virus. The virus causes severe disease and death in several avian and mammalian species. The objective of this study was to investigate the ability of swine and chicken tracheal cultures to support highly pathogenic avian influenza (HPAI) viral replication. Three HPAI viruses isolated from chicken (A/chicken/Thailand/CU-K2/04), duck (A/duck/Thailand/CU-328/07), and tiger (A/tiger/Thailand /CU-T7/04) in Thailand was used to infect the swine and chicken tracheal culture. Results indicated that in contrast to swine tracheal culture, chicken tracheal culture can support chicken and tiger virus replication. This finding correlates with previous studies indicating that pigs had low susceptibility to HPAI infection. The immunohistochemistry staining and histopathological study confirmed the HPAI infection as tracheal epithelium necrosis and exfoliation were observed. Nucleotide and amino acid sequences analysis from specific locations on HA, PB1 and PB2 genes from the pre and post-tracheal infection indicated that there were no genetic changed. The results of this study suggest the possibility of using animal tracheal culture as a model to further studying HPAI to better understand the mechanism of infection. The information gained from these types of studies can be supporting data for future prevention and control of HPAI infection.