TABLE 2.

Detection of M. avium subsp. paratuberculosis DNA or viable M. avium subsp. paratuberculosis in 5 to 7 settled-dust samples collected at sampling 1 or 2

No. of positive dust samples	No. of farms with:
	M. avium subsp. paratuberculosis DNA						Viable M. avium subsp. paratuberculosis
	Control (n = 2)		Group A (n = 8)		Group B (n = 14)		Control (n = 2)		Group A (n = 8)		Group B (n = 14)
	S1	S2	S1	S2	S1	S2	S1	S2	S1	S2	S1	S2
0	2	2	4	3	4	5	2	2	8	5	8	6
1			3	4	4	6				1	2	4
2					4	3				1	1	2
3			1	1	1	1				1	1	2
4					1						2