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Volume 18, Number 11—November 2012
Research

Livestock Density as Risk Factor for Livestock-associated Methicillin-Resistant Staphylococcus aureus, the Netherlands

Beth J. FeingoldComments to Author , Ellen K. Silbergeld, Frank C. Curriero, Brigite A.G.L. van Cleef, Max E.O.C. Heck, and Jan A.J.W. Kluytmans
Author affiliations: Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (B.J. Feingold, E.K. Silbergeld, F.C. Curriero); National Institute for Public Health and the Environment, Bilthoven, the Netherlands (B.A.G.L. van Cleef, M.E.O.C. Heck); and Amphia Hospital, Breda, the Netherlands; and VU University Medical Center, Amsterdam, the Netherlands (B.A.G.L. van Cleef, J.A.J.W. Kluytmans)

Main Article

Table 1

Characteristics of population in study of LA-MRSA carriage, the Netherlands, 2003–2005*

Characteristic MRSA status, no. (%) persons
Total no. (%) persons p value†
LA-MRSA T-MRSA
Total, N = 87
27
60
87

Probable source

Health care setting

3 (11.11) 30 (50.00) 33 (37.93)

Foreign

2 (7.41) 3 (5.00) 5 (5.75)

Unknown

13 (48.15) 20 (33.33) 33 (37.93)

Other


9 (33.33)
7 (11.67)
16 (18.39)
0.001
Contact with livestock and farms

With pigs

10 (37.04) 3 (5.00) 13 (14.94) 0.000

With cows


7 (25.93)
1 (1.67)
8 (9.20)
0.001
Residential location

Rural


12 (44.44)
4 (6.67)
16 (18.39)
0.000
Livestock density in municipality, animals/ hectare/ municipality

Pigs

Quartile 1, 0.000–0.004

0 16 (26.67) 16 (18.39)

Quartile 2, 0.005–0.651

5 (18.52) 15 (25.00) 20 (22.99)

Quartile 3, 0.652–3.268

6 (22.22) 12 (20.00) 18 (20.69)

Quartile 4, 3.269–45.477

16 (59.26) 17 (28.33) 33 (37.93) 0.003

Cows

Quartile 1, 0.00–0.340

3 (11.11) 30 (50.00) 33 (37.93)

Quartile 2, 0.341–0.848

8 (19.63) 8 (13.33) 16 (18.39)

Quartile 3, 0.849–1.496

3 (11.11) 14 (23.33) 17 (19.54)

Quartile 4, 1.497–5.920

13 (48.15) 8 (13.33) 21 (24.14) 0.000

Veal calves

Quartile 1, 0.000–0.000

0 20 (33.33) 20 (22.99)

Quartile 2, 0.001–0.013

4 (14.81) 13 (21.67) 17 (19.54)

Quartile 3, 0.014–0.178

10 (37.04) 13 (21.67) 23 (26.44)

Quartile 4, 0.179–4.818


13 (48.15)
14 (23.33)
27 (31.03)
0.000
Population density

Quartile 1, 0.250–2.027

11 (40.74) 6 (10.00) 17 (19.54)

Quartile 2, 2.028–3.649

11 (40.74) 11 (18.33) 22 (25.29)

Quartile 3, 3.650–9.175

2 (7.41) 18 (30.00) 20 (22.99)

Quartile 4, 9.176–57.11

3 (11.11) 25 (41.67) 28 (32.18) 0.000

*MRSA, methicillin-resistant Staphylococcus aureus; LA-MRSA, livestock associated MRSA; T-MRSA, typeable MRSA.
†Fisher exact test for differences in MRSA status by covariate categories.

Main Article

Page created: October 15, 2012
Page updated: October 15, 2012
Page reviewed: October 15, 2012
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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