From: The passage of cells can improve the detection rate of avian leukosis virus to facilitate the elimination of avian leukosis in chickens
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
positive rate
Passaged sample
-
+
15/21
Unpassaged sample
9/21