Table 3. Distribution of Salmonella serotypes associated with predominant R-patterns.
| Salmonella serotypes (n) | Predominant patternsa (n) | Manure n(%)b | Soil n(%)b |
|---|---|---|---|
| Typhimurium var5-1 (42) | AMP FIS KAN STR (19) | 2 (10.53) | 17 (89.47) |
| FIS KAN STR (17) | 0 | 17 (100) | |
| AMP AUG2 FIS KAN STR (2) | 0 | 2 (100) | |
| FIS KAN STR TET (2) | 0 | 2 (100) | |
| AMP CHL FIS KAN STR TET (1) | 1 (100) | 0 | |
| AMP FIS STR (1) | 0 | 1 (100) | |
| Senftenberg1 (28) | FIS STR TET (25) | 7 (28.0) | 18 (72.0) |
| AMP FIS STR TET (2) | 2 (100) | 0 | |
| AMP AUG2 FIS FOX KAN STR TET (1) | 0 | 1 (100) | |
| Worthington1 (15) | FIS GEN KAN STR TET (9) | 0 | 9 (100) |
| STR TET (5) | 0 | 5 (100) | |
| FIS GEN KAN STR SXT TET (1) | 0 | 1 (100) | |
| Rissen1 (17) | STR TET (15) | 9 (60) | 6 (40) |
| AMP CHL FIS STR SXT TET (1) | 1 (100) | 0 | |
| AMP STR TET (1) | 0 | 1 (100) | |
| Anatum2 (13) | Pan-susceptible (3) | 3 (100) | 0 |
| STR (3) | 1 (33.33) | 2 (66.67) | |
| AMP AUG2 AXO FOX KAN STR XNL (2) | 2 (100) | 0 | |
| FIS STR (2) | 1 (50) | 1 (50) | |
| AMP AXO FIS STR XNL (1) | 1 (100) | 0 | |
| AUG2 AXO FOX KAN STR XNL (1) | 1 (100) | 0 | |
| AXO FOX XNL (1) | 1 (100) | 0 |
a ampicillin (AMP), amoxicillin/clavulanic acid (AUG2), cefoxitin (FOX), ceftiofur (XNL), ceftriaxone (AXO), chloramphenicol (CHL), kanamycin (KAN), streptomycin (STR), sulfisoxazole (FIS), trimetroprim/sulfamethoxazole (SXT), and tetracycline (TET)
b number of isolates (percent resistant to a specific R-pattern)
1 Salmonella serotypes isolated from commercial swine farms in North Carolina.
2 Salmonella serotype isolated from commercial swine farm in Iowa.