title: Results of field trials with a pseudorabies virion skin test antigen.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000276:immunology*; D005069:Evaluation Studies as Topic; D011558:Herpesvirus 1, Suid / Q000276:immunology; D006968:Hypersensitivity, Delayed / Q000276:immunology; D011557:Pseudorabies / Q000175:diagnosis* / Q000276:immunology; D012882:Skin Tests / Q000592:standards*; D013552:Swine / Q000276:immunology
chemical_list: D000956:Antigens, Viral