Sequence comparison of the ORF 7 region of transmissible gastroenteritis viruses isolated in Japan.

ABSTRACT

The 3' end region nucleotide sequence, including ORF7, of nine Japanese and two U.S.A. isolates of transmissible gastroenteritis virus (TGEV) were determined and compared. Nine Japanese TGEV strains have been isolated over the past 40 years (1956-1997). From the comparison of determined nucleotide sequences, we could divide the TGEV Japanese isolates into two groups and distinguish them from TGEV U.S.A. isolates.