Abstract
Guinea pigs were exposed to a commerical preparation of the nuclear-polyhedrosis virus of Heliothis zea (Biotrol VHZ 2 2 Manufactured by Nutrilite Products, Inc., Buena Park, California 90620. ). The material was administered in the form of polyhedral inclusion bodies (PIB) and free virus rods by inhalation and intradermal injection. In all tests, there were no discernible differences between treated and control groups.
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