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The Effect of Tetracycline on the Coliform Gut Flora of Broiler Chickens with Special Reference to Antibiotic Resistance and O‐Serotypes of Escherichia coli
Author(s) -
HOWE KATHERINE,
LINTON A. H.,
OSBORNE A. D.
Publication year - 1976
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1976.tb00658.x
Subject(s) - tetracycline , serotype , broiler , biology , escherichia coli , antibiotics , microbiology and biotechnology , antibiotic resistance , flora (microbiology) , veterinary medicine , food science , bacteria , medicine , gene , biochemistry , genetics
The effect of terramycin, administered prophylactically in drinking water, on the gut flora of broiler birds was investigated. Exposure to the antibiotic for only 24 h profoundly affected the counts of tetracycline‐resistant strains and selected O‐serotypes carrying resistance determinants. Large numbers of Escherichia coli resistant to sulphonamides were found in treated and control birds and this is discussed in relation to the use of sulphaquinoxaline as a coccidiostat. Evidence of carcass contamination by antibiotic resistant E. coli found in the gut is presented.