Unidirectional animal-to-human transmission of methicillin-resistant Staphylococcus aureus ST398 in pig farming; evidence from a surveillance study in southern Italy

Table 2 Epidemiological correlations between MRSA isolates from farm workers and swine

Farm ID	Human		Swine
Farm ID	No. MRSA-positive/No. of sampled workers	Combined type^a (No. of isolates)	No. MRSA-positive/No. of sampled swine	Combined type^a (No. of isolates)
01CZ	2/5	t011, V, A (1)	9/12	t011, V, A (9)
		t011, V, C (1)^b
02CZ	2/3	t108, V, C (1)	8/10	t108, V, C (3)
		t899, IVc, C (1)		t899, IVc, C (1)
				t034, V, C (4)
03CZ	1/2	t034, V, E (1)	5/10	t034, V, E (2)
				t571, V, D (2)
				t034, V, A (1)
05CS	2/5	t011^c, V, C (1)	24/30	t011^c, V, C (2)
		t1606, V, C (1)		t1606, V, C (13)
				t011^c, V, A (8)
				t5524, V, C (1)
07KR^d	1/5	t011, V, C (1)	18/19	t011, V, C (11)
				t011, V, A (7)
11RC	1/2	t899, IVc, F (1)	10/13	t899, IVc, F (10)
18CS^d	3/3	t011, V, C (2)	10/10	t011, V, C (8)
		t034, V, C (1)		t1184, V, C (2)
19RC	2/2	t034, V, B (2)	6/20	t034, V, B (1)
				t034, V, D (2)
				t1793, V, B (2)
				t571, V, D (1)
21RC	2/4	t034, V, D (1)	0/16	–
		t2922, V, D (1)		–
29RC	2/3	t034, V, A (2)	9/20	t034, V, A (2)
				t899, V, C (7)
32RC	1/2	t034, V, A (1)^b	8/9	t034, V, D (2)
				t10485, V, D (4)
				t011, V, D (1)
				t2876, V, D (1)

Human and swine isolates for which an epidemiological association has been identified are highlighted in bold
^aspa, SCCmec, Rep-MP3 type
^bFor these isolates results have also been confirmed by RAPD typing
^ct011 isolate(s) displaying the IS256 insertion signature in the A07 fragment of the SAPIG2195 coding region (IS256::A07) (ref. [15])
^dTrading of animals during the survey period has been documented between farm ID 07KR (seller) and 18CS (purchaser) (ref. [15])

ISSN: 2047-2994