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Volume 13, Number 4—April 2007

Dispatch

Antimicrobial Drug Resistance of Salmonella Isolates from Meat and Humans, Denmark

Marianne N. Skov*, Jens Strodl Andersen†, Søren Aabo†, Steen Ethelberg‡, Frank M. Aarestrup†Comments to Author , Anders Hay Sørensen†, Gitte Sørensen†, Karl Pedersen†, Steen Nordentoft†, Katharina E.P. Olsen‡, Peter Gerner-Smidt‡, and Dorte L. Baggesen†
Author affiliations: *University of Southern Denmark, Odense, Denmark; †Danish Institute for Food and Veterinary Research, Copenhagen, Denmark; ‡Statens Serum Institut, Copenhagen, Denmark;

Main Article

Table 1

Number and proportion of susceptible (S), resistant (R), multidrug-resistant (M), and nalidixic acid–resistant (Nal) Salmonella spp. isolates within different serotypes isolated from meat and humans, Denmark, July 1998–July 2002*

Serotype Domestic meat
Imported meat
Humans†
No. tested %
No. tested %
No. tested %
S R M Nal S R M Nal S R M Nal
Typhimurium‡
1,508
73
21
6
1
138
34
24
42§

1,886
61
20
19
3
Infantis‡
184
94
4
2
2
50
84
10
6






Derby‡
163
55
44
1
1
34
32
59

3





Heidelberg
6
67
33
0
17
157
49
13
38
4





Hadar‡
38
74
26
0
11
113
1
53§
46§
81§
189
26
71
3
58
Enteritidis‡
91
90
9
1
4
50
84
16
0
10
1,706
92
7
0
4
Indiana‡
94
95
4
1
0
40
45
43§
13§
3





Newport
2
0
100
0
100
78
28
51
21
60
59
88
7
5
5
Kottbus
26
81
19
0
15
49
6
90
4
92





Dublin
71
99
1
0
1
4
100
0
0
0
88
95
5
0
2
Anatum
50
100
0
0
0
12
75
8
17
0





Saintpaul
9
11
0
89
22
39
31
8
62
15
58
72
9
19
7
Regent
47
0
100
0
100
1
0
100
0
0





Virchow
3
100
0
0
0
39
44
36
21
49
95
35
56
9
62
Bredeney
3
100
0
0
0
38
34
0
66
11





Other‡
690
71
24
5
5
256
56
24
20
17





Total 2,985 74 22 4 4 1,078 42 30 28 26 4,081 73 17 9 7

*Only serotypes with ≥40 isolates are included.
†Only subsets of selected serovar are routinely tested for susceptibility to antimicrobial agents.
‡Indicates serotypes with >30 samples from Danish produced meat and >30 samples from imported meat, which were statistically tested.
§Indicates clinical significance.

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