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…The type of nutrition exhibited when organism lives…Which of the following are not causative organisms…The diagram above shows the dentition of an…The causative agent of bird flu is a?