5Witte W. Ecological impact of antibiotic use in animals on different complex microflora: environment. International Journal of Antimicrobial Agents, 2000, 14: 321-325.
6Ferrandiz M J, Fenoll A, Linares J. Horizontal transfer of parC and gyrA in fluoroquinolone-resistant clinical isolates of Streptococcus neumoniae. Ntimicrobial Gents and Chemotherapy, 2000, 44(4):840-847.
9Blanco J E, Banco M, Mora A, Jansen W H, Garcia V, Vazquez M L,Blanco J. Serotypes of Escherichia coli isolated from septicaemic chickens in Galicia. Veterinary Microbiology, 1998, 61(3): 229-235.
10Hee Kon Jung, DVM, MPH, Identification of serotype by use of serologic assay and detection of the enterotoxin gene of Escherichia coli by means of a polymerase chain reaction assay for isolates from pigs, chickens, and cows. American Journal of Veterinary Research,1999, 60(4): 468-472.
