Evaluation of resistance to fluoroquinolones and determination of mutations in gyrA and parC genes in Escherichia coli isolated from raw milk of dairy cows with coliform mastitis in Khorasan Razavi province, Iran Journal title: Iranian Journal of Veterinary Science and Technology (IJVST) Authors: Mahdie Mahdavi,Behrooz Fathi,abdollah Jamshidi,Babak Khoramian, Subject(s): Veterinary Science