An experimental study reveals that APMV-1 stimulate a strong and intense expression of the IFN-β in ducks compared to chickens [42], and also up-regulate the IFN-β, IFN-regulatory factor 7 (IRF-7), and decreases the virus titer in goose lung and air-sac post-infection [34]. This evidence concerns the gene IFNB1 and infection.