| survey on tetracycline resistance and antibiotic-resistant genotype of avian escherichia coli in north china. | the experiment was performed to investigate the tetracycline resistance and antibiotic-resistant genotype of avian escherichia coli in north china and to analyze the correlation of genotype and phenotype. the resistance of 164 e. coli isolates (from beijing, tianjin, inner mongolia, shanxi, and hebei regions of china) to tetracycline, doxycycline, and minocycline was investigated by using a drug susceptibility test. the results show that the rate of resistance to tetracycline antibiotics was 89. ... | 2012 | 23091131 |