Arkan Lubani

nice impressive topic , i used to vaccinate birds at 4 day feed topping vaccination, do you have any comparative study? Between routs of conidial vaccine administration and its efficiency

I think before giving the IB VAC we should at least study the area disease history: frequent variants will lead to immunocompromised birds. Be careful I think, two variants is more than enough, focusing on SOP of the farm, ventilation system, finally using the mass strain periodically from different companies in layer and breeder.

Mainly insulation of proper ventilation system is targeted goal to subside frequent infection by APEC, Moreover using sensitivity test for best antibiotic use ...don't use vaccines after 20 days old, last important thing is frequent cleaning and disinfecting nipples line conferred good results in controlling bacterial proliferation.

One question: what about using Ozone to upgrade and decontaminate air in broiler sheds?

Frankly, Biosecurity and Good SOP in breeder farm (disinfecting, cleaning, day to day monitoring) are the crucial action against IBV field strains, otherwise a punch of vaccine will never confer protection, here we are know needing new strategy to characterize and identify the genotype of field challenge immediately, then use the closet vaccine strain, the advance in metagenomic analysis might be ...