Table 1.

Bursa of Fabricius samples collected from farms in Thailand from April 2017 to October 2019.

Farm	No. of total samples (No. of sequence sample)	Bursal lesion	IBDV screening test (Strain classification result)
A	10 (2)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (vvIBDV)
B	5 (1)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (vvIBDV)
C	1	Swelling	Negative
D	11	No lesion	All samples were negative
E	2	Bursa was smaller than usual	All samples were negative
F	5 (1)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (cIBDV)
G	7 (1)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (cIBDV)
H	7 (1)	Redness and swelling	All samples were positive (vvIBDV)
I	5 (1)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (vvIBDV)
J	17 (2)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (cIBDV)
K	1	Redness	Negative
L	10 (1)	Redness, swelling, inflammation, petechial hemorrhage, and debris found inside the bursa	All samples were positive (vvIBDV)
M	2 (1)	Samples were already homogenate at the farm	All samples were positive (cIBDV)
N	2 (1)	Redness	All samples were positive (cIBDV)
O	10 (2)	Redness	All samples were positive (vvIBDV)
P	2 (1)	Redness, swelling, and petechial hemorrhage	All samples were positive (cIBDV)

IBDV=Infectious bursal disease virus, vvIBDV=Very virulent infectious bursal disease virus, cIBDV=Classic infectious bursal disease virus