Sequencing of parts of the spike, small membrane, and integral membrane protein genes of English isolates of avian infectious bronchitis virus (IBV) isolated in the 1960s revealed that they were not the direct ancestors of those isolated in the 1980s.
year โฐ 1993
issn ๐Ÿ—„ 03048608 14328798
volume 130
number 3-4
page 471-476
citedbycount 17