It has been shown by virus isolation, serologic and human volunteer experiments that epidemic keratoconjunctivitis (EKC) is caused by adenovirus Type 8.In the acute conjunctivitis stage of EKC, characteristic inclu sion bodies can be seen in the cytoplasm of conjunctival epithelial cells (Wriyht, 1930; Zur Ncdden, 1938;Maumenee et al, 1945; SieBoen-Lian, 1948, 1962Silva, 1948;Lepri, 1952; Hofmann, 1955;Imre et al, 1963, and Necsei, 1963). The nature of the inclusion bodies is not clear; they may correspond to aggregates of virus particles of metabolic products formed by the interaction of virus and host cell.