artsiom sereda

It should be noted that intermediate plus and hot vaccines can break through mab and also will cause significant damage to bursa of fabricius. If u are in very endemic areas u can consider using this type of vaccine. This also has something to do with expertise cos if not u can have vaccine break and thus experience classical infection. So pls always be aware of the type of gumboro vaccine u are u ...

I Dr m Usman haider lot of factors are here for good IBD tigers. 1.Wt of day old chick chicks between 36 to 40gm have good maternal antibiotics titer you can vaccinate the flock Ist shot from 7 to 9 days of age but again area of flock Ist live shot can not provide titer up to protectI've margen because 1 to 3 days need recognization of antigen and further 3 to 4 production of antibodies so a gap ...

I shall talk about killed MG vaccine. My personal experience shows that it can not prevent neither the field infection nor the clinical symptoms. It can not produce local protection at the trachea and lungs. It produces high level of EliSA titers. We can use antimycoplasma safely.

Wael Elfeil Thanks for useful discussion I totally agree with you about when we use homologous vaccine against field strain ,they will induce good protection such as if we have Middle East strain we can use Var -2 vaccine but if we we have many serotype in field situation such as var-2 and QX I advice use protecotype theory to induce cross protection against other serotype Kindly if you have te ...

Hi there, We have seen birds respond differently to the ts-11 vaccine recently especially when it comes to serological-based tests for diagnoses in vaccinated flocks. Recent observations from a longitudinal field study on commercial layers in Australia are showing increasing serology titers in vaccinated birds correlating with increasing detection of the ts-11 and MS-H vaccine strain genomes in t ...

artsiom sereda Based on Epidemiology of IB in your area If you Have IB GI-13 , you can use 793b in the vaccination program if your area dominate with GI-19, better to use QX if your area dominate with GI-23, better to use Var2

artsiom sereda sure its residual pathogenicity still high, if the Dayold chicks with low MDA, it has adverse effect

Fazal Malik Malik mutation risks in IB is high whatever the vaccines used It can occur in nature with wild virus or even between wild virus and any vaccine seed IB , belong to corona family, one of its main characteristic features is mutation and recombination