Table 6

Distribution of Salmonella serotypes associated with predominant MDR patterns in conventional production systems

Serotype (n)Predominant MDR patterna (n)No. (%) of each type of isolate with each pattern
FarmSlaughter
PigsEnvironmentCarcassesEnvironment
S. Anatum (103)AMP AUG AXO FOX TIO TET (25)11 (44)14 (56)00
AMP AUG AXO FOX TIO (5)02 (40)03 (60)
S. Typhimurium (311)AMP AUG AXO FOX TIO TET (7)3 (43)4 (57)00
AMP FIS NAL STR TET (13)3 (23)8 (61)1 (8)0
AMP CHL FIS STR TET (41)5 (12)17 (41)16 (39)3 (7)
FIS SXT TET (25)08 (32)9 (36)8 (32)
FIS STR TET (18)0011 (61)7 (39)
S. Derby (106)FIS STR TET (72)2 (3)15 (21)54 (75)1 (1)
S. Heidelberg (17)KAN STR TET (11)011 (100)00
  • a AMP, ampicillin; AUG, amoxicillin-clavulanic acid; AXO, ceftriaxone; CHL, chloramphenicol; FIS, sulfisoxazole; FOX, cefoxitin; KAN, kanamycin; NAL, nalidixic acid; STR, streptomycin; TET, tetracycline; TIO, ceftiofur.