Annals of Microbiology

, Volume 60, Issue 3, pp 489–494

Antibiotic resistance of Escherichia coli O157:H7 isolated from cattle and sheep

  • Muammer Goncuoglu
  • Fatma Seda Bilir Ormanci
  • Naim Deniz Ayaz
  • Irfan Erol
Original papers

Abstract

A total of 102 Escherichia coli O157:H7 colonies recovered from 11 cattle and 14 sheep were collected and tested for their antibiotic resistance profiles using a disc diffusion method, according to the Clinical and Laboratory Standards Institute. Four (36.36 %) of the 11 cattle E. coli O157:H7 isolates were resistant to cephalothin, one (9.09 %) isolate was resistant to streptomycin, and one (9.09 %) to nalidixic acid. Two (14.28 %) of the 14 sheep E. coli O157:H7 isolates were resistant to sulphamethoxazole, one (7.14 %) isolate was resistant to sulphonamide compounds, and one (7.14 %) to streptomycin. All cattle and sheep isolates were found to be susceptible to cephazolin, gentamicin, ciprofloxacin, imipenem, trimethoprim/ sulphamethoxazole, chloramphenicol, trimethoprim, and ceftiofur. Six cattle isolates were susceptible at a ratio of 54.54 %, and 11 (78.57 %) isolates from sheep were susceptible to all 20 antibiotics tested. As an overall result, 68 % of the E. coli O157:H7 isolates belonging to cattle and sheep were susceptible to all antibiotics tested. On the other hand, most of the E. coli O157:H7 isolates were intermediately resistant to streptomycin, cephalothin, sulphamethoxazole, ampicillin, and kanamycin.

Keywords

E. coli O157:H7 Antibiotic resistance Cattle Sheep 

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Copyright information

© Springer-Verlag and the University of Milan 2010

Authors and Affiliations

  • Muammer Goncuoglu
    • 1
  • Fatma Seda Bilir Ormanci
    • 1
  • Naim Deniz Ayaz
    • 1
  • Irfan Erol
    • 1
  1. 1.Department of Food Hygiene and TechnologyAnkara University, School of Veterinary MedicineAnkaraTurkey

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