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Mi 





10 



Fig. 8. Surface of chorioallantoic cell infected with Newcastle disease virus (mild 

 strain) showing elongated microvilli with ballooning tips and unaltered cytoplasm. 

 Dark large oval body in center is red cell apparently adherent to \ irus extrusions (Bang, 

 1955a) (Magnification: X 18,000). 



Fig. 9. Newcastle virus infection of tissue culture showing dense spherical masses at 

 tips of filament (Bang, 1953a) (Magnification: X 10,000). 



Fig. 10. Newcastle virus infection of tissue culture. Long irregularly segmented and 

 pinched filaments with roughly spherical forms along the filaments and extruded from 

 them (Bang, 1953a) (Magnification: X 10,000). 



