Gewebekultur post infektionem mit Parainfluenza Virus 3. Unter dessen Einfluß verschmelzen Einzelzellen zu Riesenzellkomplexen. Kernpyknose und Zytoplasmaretraktion: Es bleiben strahlenförmig angeordnete Zytoplasmafäden zurück.

The film shows the fusion of human epithelial cells (HEp-2) in tissue culture after infection with parainfluenza virus 3. Under the influence of this virus infection individual cells agglomerate, their membranes disappearing, to become giant cell complexes, which may grow to a considerable size. In the further course of the infection pyknosis of the nuclei and retraction of the cytoplasm of the multinuclear syncytia develop. Thin long drawn out filaments of cytoplasm arranged in a radiating pattern remain.