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E. Coli

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3-Results of antibiogram on biotypes from one day old chicks, broiler and<br />

layers showed that all the isolates were sensitive to cefotaxime and<br />

ciprofloxacin, also all one day old chicks isolates were sensitive to colistin<br />

except one isolate from only one farm, meanwhile the isolates from all layer<br />

farms were resistant to colistin except only two farms and there was<br />

varying resistance to (Sulphamethazole, trimethoprime), <strong>Coli</strong>stin and<br />

Spectam in broiler isolates.<br />

4-Sensitivity Pattern of layers isolates revealed that there were no isolates<br />

sensitive to all drugs also no isolates were sensitive to only one or only two<br />

or only three drugs, meanwhile most isolates were sensitive to only four or<br />

more drugs indicating that the isolates from layers were less resistant than<br />

that from one day old chicks.<br />

5-Results of sensitivity percentage of each antimicrobial agents against<br />

isolates from one day old chicks revealed that the cefotaxime, ciprofloxacin,<br />

and colistin are first three effective drugs should used in cases of<br />

emergencies, infection control or for treatment of one day old chicks.<br />

6-Results of sensitivity percentage of each antimicrobial agents against<br />

isolates from layers and broiler revealed that the cefotaxime, ciprofloxacin<br />

and rifampicin, are first three effective drugs should used in cases<br />

emergencies, infection control or for treatment of layers and broiler.<br />

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