The causative organism of Avian influenza is a? by Sunday | Dec 20 | Agricultural Science WAEC | 0 comments A. bacterium B. virus C. fungus D. protozoan. Correct Answer: Option B – virus Users Also Read These:The activity of an organism which affects the…An association between living organisms in which one…The activities of an organism which affect the…The type of nutrition exhibited when organism lives…The causative agent of bird flu is a?