TABLE 2.

Prevalence and antimicrobial resistance of C. jejuni and C. coli plus other Campylobacter species in conventional and organic broiler and turkey farms

FarmaNo. (%) of positive samples/total no. of samplesbNo. (%) of positive samplesMajor antimicrobial resistance patternd
C. jejuniC. colic
CB-120 (66.67)/3020 (100)0 (0)TET or FQ
CB-214 (56.00)/2514 (100)0 (0)TET-KAN-FQ
CB-323 (76.63)/3023 (100)0 (0)TET
CB-422 (73.33)/3022 (100)0 (0)TET
CB-530 (66.67)/4523 (76.67)7 (23.33)TET-FQ
CB-627 (67.50)/4027 (100)0 (0)TET
CB-724 (60.00)/4024 (100)0 (0)TET-FQ
CB-816 (53.33)/3016 (100)0 (0)TET or TET-FQ
CB-911 (44.00)/2511 (100)0 (0)TET or KAN
CB-1040 (80.00)/5040 (100)0 (0)TET or TET-FQ
Total227 (65.80)/345220 (96.92)7 (3.08)
OB-185 (91.40)/9353 (62.35)32 (37.65)TET
OB-282 (88.17)/9361 (74.39)21 (25.61)TET or TET-KAN
OB-322 (81.48)/2713 (59.09)9 (40.91)KAN or TET-KAN
OB-496 (100)/9670 (72.92)26 (27.08)No resistancee
OB-532 (69.57)/4632 (100)0 (0)TET
Total317 (89.30)/355229 (72.24)88 (27.76)
CT-120 (66.67)/308 (40)12 (60)TET-KAN-CLI-ERYf
CT-239 (86.67)/457 (17.95)32 (82.05)TET-KAN-CLI-ERY-FQ
CT-344 (97.78)/4517 (38.64)27 (61.36)TET-KAN-CLI-ERY-FQg
CT-424 (80.00)/3016 (66.67)8 (33.33)TET-KAN-CLI-ERY-FQ
CT-519 (63.33)/3011 (57.89)8 (42.11)TET-KAN-CLI-ERY-FQ
CT-640 (88.89)/4526 (65)14 (35)TET-KAN-CLI-ERY-FQg
CT-721 (70.00)/3011 (52.38)10 (47.62)TET
CT-829 (96.67)/3016 (55.17)13 (44.83)KAN-ERYh
CT-921 (70.00)/3012 (57.14)9 (42.86)No specific patterni
CT-1042 (93.33)/4513 (30.95)29 (69.05)TET-KAN-CLI-ERY-FQg
Total299 (83.06)/360137 (45.82)162 (54.18)
OT-140 (93.02)/4320 (50)20 (50)TET
OT-242 (100)/4233 (78.57)9 (21.43)TET or TET-KAN
OT-388 (93.62)/9449 (55.68)39 (44.32)KAN or TET-KAN
OT-41 (5.56)/181 (100)0 (0)TET
OT-530 (90.91)/3330 (100)0 (0)TET-KANj
Total201 (87.39)/230133 (66.17)68 (33.83)
  • a CB, conventional broiler farm; OB, organic broiler farm; CT, conventional turkey farm; OT, organic turkey farm.

  • b Number (%) of intestines positive for Campylobacter species/number of intestines isolated for Campylobacter species.

  • c Number (%) of intestines positive for C. coli and other Campylobacter species.

  • d CLI, clindamycin; ERY, erythromycin; FQ, fluoroquinolones; KAN, kanamycin; TET, tetracycline.

  • e None of the Campylobacter isolates was resistant to antimicrobial agents tested in this study.

  • f Some isolates were also resistant to fluoroquinolones and ampicillin.

  • g Some isolates were also resistant to ampicillin.

  • h Some isolates were also resistant to fluoroquinolones and tetracycline.

  • i No major antimicrobial resistance pattern was observed.

  • j Only one isolate from this organic turkey farm was resistant to tetracycline and kanamycin, while the rest of the isolates were susceptible to all antimicrobial agents.