Multi-strain infection by infectious bronchitis variant viruses in broiler and breeder flocks in Latin America

Thanks for this interesting study, to find isolations from Yemen and China in Latin America, looking for updates how such a problem of IB can be solve.

Very good, interesting and informative study about the multi-strain infection of IB.

The IB Variant disease had been found in my country some ten years ago. I had diagnosed it as NEPHRITIC IB. It was confirmed by the Weybridge Laboratory. At that time, I did not want to introduce the IB VARIANT vaccines. The vaccine IB MA 5 had controlled the disease a bit. But in outbreaks, the mortality was very high in broilers. The litter became muddy. Severe diarrhoea. Nowadays, we are using the TWO vaccines, namely, the IB VARIANT 4 / 91 from Intervet and the IBIRD from CEVA. The day old chicks are being vaccinated at the Hatchery by coarse spray. The vaccinated flocks are well protected.