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 causative organism of maize rust is?Which of the following are not causative organisms…The activity of an organism which affects the…JSS2 Third Term English Language Lesson Note – The…The causative agent of bird flu is a?