a virus neutralization test <*> was established
The neutralization antibody titer of 1:4 was recognized as the positive criterion ,
In order to survey the infectious situation of canine coronavirus ( CCV ) in giant panda population , a virus neutralization test detecting specific antibodies against CCV in giant panda 's sera was established by using two - fold dilutions of serum and 100 TCIDso of the virus .
The neutralization antibody titer of 1:4 was recognized as the positive criterion , 8 sera samples were detected to be positive , and the positive rate was 12.9 % .