Fig. 2.
IFA test to detect viral NP antigens in MDCK cells infected with H5N1 and cultured in the presence of frHibis. (A) No viral NP antigen-positive MDCK cells are observed. Cells inoculated with Chicken/Yamaguchi/7/04 were cultured with medium containing 5.3-mg/ml frHibis for 48 hr. (B) Viral NP antigen-positive MDCK cells are observed. The inoculated cells were cultured with medium.