Table 2. The number of sites whose samples were collected from February to May 2017.

Variables		No. of sites collecting sample	No. of sites using unexamined samples				No. of examined samples
			Certification cancelled	Uncertificated	Miss-written	Combination of two disinfectants
Livestock farm
	Laying hens	7	0	0	0	0	7
	Parents stock	7	1	0	0	0	6
	Broiler	33	2	1	0	0	30
	Korean native chicken	2	0	0	0	0	2
	Duck	7	0	0	0	0	7
	Korean cow (Han-woo)	57	3	0	0	0	54
	Dairy cow	15	1	0	0	0	14
	Pig	61	12	0	0	0	49
	X*	48	1	2	1	0	44
	Total (A) (%)	237	20 (8.44)	3 (1.26)	1 (0.42)	0	213 (89.87)
Livestock facility
	Abattoir	16	1	0	0	1	14
	Chicken abattoir	6	0	0	0	0	6
	Feed Manu-facture factory	4	0	0	0	0	4
	Total (B) (%)	26	1 (3.85)	0	0	1 (3.85)	24 (92.31)
Official disinfection station
	C (%)	14	0	0	0	0	14 (100)
Total (A + B + C)		277	21 (7.58)	2 (0.72)	1 (0.36)	1 (0.36)	251 (90.61)

Sites are classified by facility type and the reasons for unexamined samples.

Concentration of each sample follows the Animal and Plant Quarantine Agency of Korea guidelines.

A, no effective disinfectant was detected; B, low concentration (< 1X); C, proper concentration (1X ≤ and < 2X); D, overconcentration (2X ≤).

X^*, the farms raise more than two kinds of livestock.