This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Influenza virus culture is done on ? 
Select and explain. 
A. Chorioallantoic membrane, B. Allantoic cavity, C. Yolk sac, D. All
B: Allantoic cavity
Answer: B: Allantoic cavity 
Explanation: Ans. is b i.e., Allantoic cavity In embryonated egg cultivation for influenza virus site of inoculation are :- Allontoic cavity or amniotic cavity Inoculation sites in embryonated eggs Chorioallantoic membrane -4 HSV, Poxvirus, Rous-sarcoma virus Amniotic cavity -4 Influenza virus, mumps virus Allantoic cavity - Influenza virus, mumps virus, an adenovirus, newcastle disease virus Yolk sac --> HSV, chlamydia, rickettisia