BAWINDSOMDE OUEDRAOGO

The inappropriate use of vaccination calendars with strains that do not exist in the wild leads to antigenic variants.In short: variants arise because those who administer vaccines with non-existent strains provide material for the virus to recombine.

@Dr Kotaiah Talapaneni Good option!

@Daniel Mc Elroy My suggestions are:1- Make sure the female broiler breeders not to be infected with AIBV strains such as D388 genotype of QX, Mass 33, and Australian T strain before 3 weeks age and even though before peak of production (37 weeks age) by bio-security and good vaccination with effective vaccines.2- In case of AIB infection occurred before 3 weeks age;a. Percentage of infection shou ...

@oumed gerjis Thanks Dear for valuable guidance. I have observed that poultry Farmers instead of working on bio security & other health management in long lived birds like commercial layer birds, give Live IB vaccines of both classic & variant types with the interval of 30 to 50 days. Only one type of vaccine is used at one time & is usually Massachusetts type but variant (usually 4/91 mostly is g ...