The Immunometabolic Responses of Heritage and Modern Broilers to Immune Challenge: Learning From the Past to Inform the Future

Now low pathogenic avian influenza is endemic. Low pathogenic avian influenza is exacerbated by bacterial and viral agents. so called lPAI can cause mortality even up yo 90 percent due to exacerbation. No prophylactic vaccination against avian influenza. Under poultry management sanitation covers water and environment, feed shows heavy bacterial contamination. No feed sanitation is done as a routine, European Union recommends formalin up to 2.5 l per tonne of feed for maintaining immunity and production. Feed sanitation is essential. a.t. venugopalan.

Ha Formalin for immunity, how come such approval, will it not slow down and crash flora. Hence is used for preservation of dead against decay? Where is the source of reference?