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Antimicrobial Susceptibility Survey

1/97-10/97

 An antimicrobial susceptibility survey over time is an excellent way to monitor the development of resistant pathogenic bacteria. The following tables (Tables 1-3) summarize the antibiogram for pathogens isolated, during January to October of 1997, from swine (Table 1), bovine-dairy (Table 2) and bovine-beef (Table 3).

 "% S" indicates the percentage of organisms isolated from sick animals which were susceptible to the testing antibiotic(s) in vitro. Organisms with MS (moderately susceptible), I (intermediate) or R (resistant) are not included at this time. Therefore this data represents the most stringent susceptibility results. Please keep in mind that even though the in vitro data may not totally reflect the in vivo efficacy of an antibiotic, it remains the most reliable means to select for the best antibiotic(s) and the dose(s).

 As you are browsing through the table of interest, please keep in mind that the data did not account for moderately susceptible organisms. Therefore, one should not be overly concerned with the fact that 0% (N=300) of E. coli from pigs are susceptible to Tylosin. This is merely stating that all E. coli tested were not susceptible to tylosin at its lowest effective dose. Tylosin may be effective at a higher dose and only through the susceptibility data, and effective dose can be prescribed for efficient treatment.

% S = % susceptible

* = FDA approved therapeutic antimicrobial agents.
S>treptococcus sp. - includes S. agalactiae, alpha hemolytic Strep., non-hemolytic Strep. and S. uberis.
Staphylococcus sp. - includes S. aureus, S. epidermidis, and S. hyicus.
Salmonella sp. - includes C1, C2, B, and E1.

Bovine Dairy Susceptibilities

1/97-10/97

Acinetobacter
sp.
Escherichia
sp.
Hemophilus
somnus
Klebsiella
sp.
ANTIMICROBIC
#
%S
#
%S
#
%S
#
%S
*Amikacin
10
0
106
43
4
25
5
60
Amoxicillin
10
80
68
66
3
100
2
0
*Ampicillin
17
71
131
53
5
100
15
40
Apramycin
10
90
106
71
4
75
5
80
*Cefitofur
17
47
131
85
5
100
15
80
*Cephalothin
17
12
131
50
5
100
15
80
Clindamycin
 
 
46
0
1
100
3
0
Cloxacillin
7
14
25
0
1
100
10
0
Enrofloxacin
10
100
106
94
4
100
5
100
*Erythromycin
17
30
131
0
5
60
15
0
Florfenicol
 
 
38
0
1
100
3
0
*Gentamicin
10
100
106
68
4
75
5
40
Lincomycin
10
0
60
0
3
0
2
0
Neomycin
10
100
106
37
4
25
5
40
Novobiocin
10
40
106
0
4
100
5
0
*Oxacillin
10
10
106
2
4
100
5
0
*Penicillin
17
59
131
1
5
100
15
6
*Penic/Novobi
7
57
25
20
1
100
10
50
*Pirlimycin
7
0
25
0
1
100
10
0
Sarafloxacin
 
 
38
97
1
100
3
100
*Sulfadiazine/T
17
35
94
21
4
0
12
75
Spectinomycin
10
60
106
8
4
50
5
40
Streptomycin
7
43
25
20
1
0
10
40
Sulfachloropyr
10
70
106
34
4
0
5
20
*Tetracycline
17
88
131
34
5
60
15
54
Tiamulin
10
60
106
25
4
100
5
0
*Tilmicosin
10
70
106
2
4
100
5
0
Tribrissin
10
60
106
29
4
50
5
40
Tylosin
10
10
106
0
4
75
5

 

 Pasteurella
sp. 		Streptococcus
afalactiae 		Streptococcus
sp. 		Staphylococcus
aureus
ANTIMICROBIC
#
%S
#
%S
#
%S
#
%S
*Amikacin
15
40
6
83
10
50
29
48
Amoxicillin
7
100
 
 
4
100
 
 
*Ampicillin
15
93
 
 
73
74
 
 
Apramycin
13
61
 
 
10
30
 
 
*Cefitofur
15
100
6
100
73
97
29
100
*Cephalothin
15
93
6
83
73
100
29
97
Clindamycin
6
17
 
 
7
43
 
 
Cloxacillin
2
100
6
83
63
87
29
97
Enrofloxacin
13
92
 
 
10
50
 
 
*Erythromycin
15
13
6
83
73
82
29
86
Florfenicol
6
83
 
 
6
50
 
 
*Gentamicin
13
100
 
 
10
60
 
 
Lincomycin
7
0
 
 
3
33
 
 
Neomycin
13
62
 
 
10
40
 
 
Novobiocin
13
62
 
 
10
100
 
 
*Oxacillin
13
62
 
 
10
100
 
 
*Penicillin
15
46
6
50
73
53
29
38
*Penic/Novobi
2
100
6
83
63
95
29
97
*Pirlimycin
2
0
6
100
63
84
29
97
Sarafloxacin
6
83
 
 
6
33
 
 
*Sulfadiazine/T
9
23
6
17
67
9
29
86
Spectinomycin
13
23
 
 
10
50
 
 
Streptomycin
2
0
6
17
63
11
29
52
Sulfachloropyr
13
54
 
 
10
20
 
 
*Tetracycline
15
74
6
100
73
47
29
93
Tiamulin
13
69
 
 
10
80
 
 
*Tilmicosin
13
85
 
 
10
80
 
 
Tribrissin
13
77
 
 
10
80
 
 
Tylosin
 
13
8
 
 
10
80
 

 

Bovine Dairy Susceptibilities

1/97-10/97

Staphylococcus
sp. 		Salmonella
group B
ANTIMICROBIC
#
%S
#
%S
*Amikacin
3
67
23
48
Amoxicillin
1
100
14
21
*Ampicillin
38
76
23
13
Apramycin
3
100
23
78
*Cefitofur
38
97
23
87
*Cephalothin
38
97
23
74
Clindamycin
2
50
11
0
Cloxacillin
35
100
 
 
Enrofloxacin
3
100
23
96
*Erythromycin
38
63
23
4
Florfenicol
2
0
9
0
*Gentamicin
3
100
23
83
Lincomycin
1
100
12
0
Neomycin
3
100
23
39
Novobiocin
3
67
23
0
*Oxacillin
3
67
23
0
*Penicillin
38
42
23
0
*Penic/Novobi
35
97
 
 
*Pirlimycin
35
91
 
 
Sarafloxacin
2
100
9
89
*Sulfadiazine/T
36
80
14
7
Spectinomycin
3
33
23
4
Streptomycin
35
77
 
 
Sulfachloropyr
3
67
23
13
*Tetracycline
38
61
23
9
Tiamulin
3
67
23
26
*Tilmicosin
3
67
23
0
Tribrissin
3
67
23
35
Tylosin
 
3
67
23

Bovine Beef Susceptibilities

1/97-10/97

Bacillus
sp.
Enterobactersp.
Escherichiasp.
Enterococcussp.
ANTIMICROBIC
#
%S
#
%S
#
%S
#
%S
*Amikacin
5
20
8
0
280
12
14
29
Amoxicillin
5
80
8
50
269
83
9
100
*Ampicillin
5
80
10
70
299
60
14
100
Apramycin
5
100
8
100
298
90
14
36
Cefitofur
5
60
10
100
299
88
14
50
Cephalothin
5
80
10
40
299
51
14
71
Clindamycin
1
0
 
 
32
0
5
60
Enrofloxacin
5
80
8
100
298
97
14
36
*Erythromycin
5
80
10
0
299
0
14
79
Florfenicol
1
100
 
28
0
5
0
*Gentamicin
5
100
8
100
298
80
14
50
Lincomycin
4
0
8
0
266
0
9
22
Neomycin
5
100
8
100
298
61
14
57
Novobiocin
5
100
8
0
298
1
14
79
Oxacillin
5
80
8
0
298
0
14
36
Penicillin
5
60
10
10
299
1
14
86
Sarafloxacin
1
0
 
 
28
93
5
0
*Sulfadiazine/T
4
75
10
50
270
2
9
0
Spectinomycin
5
20
8
38
298
4
14
29
*Sulfadiazine
5
80
8
100
298
38
14
21
*Tetracycline
5
60
10
100
299
23
14
21
Tiamulin
5
0
8
38
298
23
14
43
*Tilmicosin
5
100
8
13
298
1
14
64
Tribrissin
5
40
8
63
298
60
14
21
Tylosin
5
80
8
0
298
0
14

Bovine Beef Susceptibilities

1/97-10/97

Haemophilus
somnus 		Klebsiella
sp. 		Listeria
monocytogenes		 Pseudomonas
sp. 		Pasteurella
sp.
ANTIMICROBIC # %S # %S # %S # %S # %S
*Amikacin 30 10 12 0 4 25 14 7 82 12
Amoxicillin 26 85 12 75 4 75 13 30 72 86
*Ampicillin 30 80 13 15 4 75 14 21 82 68
Apramycin 30 60 12 83 4 50 14 100 82 56
Cefitofur 30 60 13 85 4 25 14 28 82 84
Cephalothin 30 87 13 77 4 50 14 28 82 83
Clindamycin 4 75     1 0 1 0 10 0
Enrofloxacin 30 87 12 100 4 25 14 100 82 82
*Erythromycin 30 70 13 0 4 75 14 14 82 7
Florfenicol 4 100         1 0 10 100
*Gentamicin 30 67 12 67 4 50 14 100 82 90
Lincomycin 26 8 12 0 3 0 13 7 72 0
Neomycin 30 53 12 67 4 50 14 93 82 65
Novobiocin 30 90 12 0 4 75 14 29 82 33
Oxacillin 30 90 12 0 4 0 14 21 82 57
Penicillin 30 77 13 0 4 75 14 29 82 60
Sarafloxacin 4 75         5 0 10 80
*Sulfadiazine/T 26 12 13 0 4 50 13 54 72 28
Spectinomycin 30 37 12 0 4 0 14 14 82 6
*Sulfadiazine 30 20 12 50 4 50 14 50 82 61
*Tetracycline 30 53 13 62 4 50 14 29 82 55
Tiamulin 30 80 12 33 4 0 14 21 82 33
*Tilmicosin 30 77 12 0 4 0 14 21 82 85
Tribrissin 30 70 12 58 4 75 14 57 82 78
Tylosin   30 80 12 0 4 75 14 7 82

 

Bovine Beef Susceptibilities

1/97-10/97

Streptococcus
sp. 		Staphylococcus
sp. 		Salmonella
sp.
ANTIMICROBIC # %S # %S # %S
*Amikacin 62 5 27 11 38 10
Amoxicillin 56 96 24 88 33 67
*Ampicillin 65 88 29 86 38 47
Apramycin 62 21 27 85 37 97
Cefitofur 65 97 29 86 38 92
Cephalothin 65 91 29 89 38 84
Clindamycin 6 50 3 33 6 0
Enrofloxacin 62 52 27 81 37 100
*Erythromycin 65 72 29 21 38 0
Florfenicol 5 20 3 0 5 0
*Gentamicin 62 47 27 85 38 84
Lincomycin 56 27 24 33 32 0
Neomycin 62 23 27 93 37 43
Novobiocin 62 92 27 89 37 0
Oxacillin 62 89 27 85 38 0
Penicillin 65 71 29 34 38 37
Sarafloxacin 5 20 3 0 5 100
*Sulfadiazine/T 59 8 26 54 32 0
Spectinomycin 62 40 27 15 37 0
*Sulfadiazine 62 16 27 70 37 35
*Tetracycline 65 28 29 55 38 39
Tiamulin 62 94 27 85 37 19
*Tilmicosin 62 65 27 85 37 0
Tribrissin 62 40 27 70 38 79
Tylosin   62 66 27 89 37

% S = % susceptible

* = FDA approved therapeutic antimicrobial agents.

Streptococcus sp. - includes S. agalactiae, alpha hemolytic Strep., non-hemolytic Strep. and S. uberis.

Staphylococcus sp. - includes S. aureus, S. epidermidis, and S. hyicus.

Salmonella sp. - includes C1, C2, B, and E1.

Locations


ADDL-West Lafayette:
406 S. University
West Lafayette, IN 47907
Phone: 765-494-7440
Fax: 765-494-9181

ADDL-SIPAC
11367 E. Purdue Farm Road
Dubois, IN 47527
Phone: (812) 678-3401
Fax: (812) 678-3412

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