title: Cytochemical Assay of Interferon Produced by Duck Hepatitis Virus.
abstract: A microscopic, cytochemical technique for assay of interferon is described in which psittacosis virus is the indicator agent. Interferon, produced in tissue culture cells in response to duck hepatitis virus, is used to illustrate the procedure.
authors.forename: E A
authors.initials: EA
authors.lastname: Sueltenfuss
authors.forename: M
authors.initials: M
authors.lastname: Pollard