“…Hydrocephalus could be induced by in utero exposure to a virus (Takano et al, 1999), toxins (Hood et al, 1976), chromium trioxide (Gale, 1978a) and lead (Gale, 1978b). It could also be induced by intracerebral inoculation with various viruses (Johnson and Johnson, 1968;Kilham and Margolis, 1969;Breschkin et al, 1976;Davis, 1981;Lagace-Simard et al, 1982), bacteria (Kohn et al, 1977 and1984) and chemicals (Mantovani et al, 1998;Azzi et al, 1999).…”