… Likewise, the ectodomain region of the S2 subunit is covered … with the 4/91 strain and 86%
with the H120 strain in the 3′ … reemergence of novel strains of infectious bronchitis virus. In …

… , novel strains and variants of infectious bronchitis virus (IBV) … by the two genes, ORF1a and
ORF1b, which are expressed as … Massachusetts type strain (95.2% similarity to strain H120) …

… to the live attenuated vaccine strains used in the regions, or are … S2 ectodomain. Asparagine
(N)-linked glycosylation sites in … All claims expressed in this article are solely those of the …

… The larger part of the ectodomain is formed by the S1 subunit … To identify the IBV strain, the
S1 gene amplicons must be … dynamics similar to those exhibited by the parental H120 strain…

… Commercial Mass-type H-120 and Ma5 as well as other Mass … differ in strain of origin and
method of development (eg, … vaccine viral load and expression of genes associated with …

… The S2 subunit consists of a narrow stalk ectodomain, a short … the North African variant strains
and was different from the H120 (GI-… Genetic analysis of MENA IBV strains based on HVR3 …

… The strategy adopted by coronaviruses in gene expression … mandatory to detect and
characterize IBV strains. The most … For instance, H120-vaccinated animals showed a reduced viral …

… -level mutations against three vaccine strains of IBV.....................… cell attachment and spans
the ectodomain segment of Spike (… This transpires by expression of the replicase gene utilising …

… Infectious bronchitis virus shows strict cell and tissue tropism. … of Beaudette strain and with
the replacement of the ectodomain of … recombinant strains expressing different regions of the S …

… S1 gene exhibited extensive variation among IBV strains and therefore, its diverse phenotypic
expression … identified as recombinant viruses between the extensively used H120 vaccine …