“…From 1965From up to 1970, out of thirty-nine cases where electron microscopy was performed, thirtysix showed the typical herpes-like particles (Rappel et al, 1971) and to date more than ten cases must be added to this series (Caulet et al, 1971;Laterre, 1972, Vital, 1972. Virus isolation and especially immunofluorescence techniques (Tomlinson & McCallum, 1969;Liu et al, 1971;Longson, 1973) have brought further evidence so that it can be assumedwith the possible exception of three cases (Duckett, Kelly & Grant, 1963;Scheid & Jochheim, 1956;Heathfield et al, 1967)-that ANE is of herpetic origin.…”