List of Articles SPF chickens Open Access Article Abstract Page Full-Text 1 - Experimental study on co-infection of H9N2 avian influenza virus with Ornithobacterium rhinotracheale in specific- pathogen- free chickens آیدین عزیزپور حسین گودرزی سعید چرخکار رضا ممیز محمدحسن حبل الورید Open Access Article Abstract Page Full-Text 2 - Experimental study of histopathological lesions induced by ornithobacterium rhinotracheale infection followed inoculation with H9N2 avian influenza virus حسین گودرزی، آیدین عزیزپور، سعید چرخکار ، محمدحسن حبلالورید، رضا ممیز . Open Access Article Abstract Page Full-Text 3 - An experimental study of histopathological lesions of secondary infection with H9N2 avian influenza virus following inoculation by Ornithobacterium rhinotracheale in SPF chickens A Azizpour Z Amirajam R khoshbakht N Hosseinpour Azad 10.30495/jcp.2023.22494