Table 1.
History of examined farms
| Farm No. | Location | No. of chicks | Total farm No. | Age of chick (day) | Mortalities in week % | Antibiotic used at 1st 3 days of age |
|---|---|---|---|---|---|---|
| 1 | El-Gharbia | 40 | 5000 | 1 | 10 | Ciprofloxacin |
| 2 | El-Gharbia | 40 | 7000 | 5 | 15 | Colistine + tylosine |
| 3 | El-Gharbia | 40 | 5000 | 3 | 5 | Ciprofloxacin |
| 4 | El-Gharbia | 40 | 10,000 | 5 | 12 | Florfenicol |
| 5 | El-Gharbia | 40 | 12,000 | 1 | 18 | Ciprofloxacin |
| 6 | El-Behera | 40 | 15,000 | 3 | 15 | Enrofloxacin + colistine |
| 7 | El-Behera | 40 | 5000 | 1 | 2 | Enrofloxacin |
| 8 | El-Behera | 40 | 10,000 | 5 | 7 | Colistine + tylosine |
| 9 | El-Behera | 40 | 15,000 | 3 | 12 | Ciprofloxacin |
| 10 | El-Behera | 40 | 20,000 | 1 | 14 | Florfenicol |
| 11 | Kafr-Elshikh | 40 | 10,000 | 5 | 10 | Enrofloxacin |
| 12 | Kafr-Elshikh | 40 | 10,000 | 5 | 8 | Oxytetracyclin + tylosine |
| 13 | Kafr-Elshikh | 40 | 15,000 | 3 | 7 | Enrofloxacin + colistine |
| 14 | Kafr-Elshikh | 40 | 20,000 | 1 | 10 | Ciprofloxacin |
| 15 | Kafr-Elshikh | 40 | 10,000 | 3 | 5 | Florfenicol |
| 16 | Alexandria | 40 | 15,000 | 5 | 8 | Ciprofloxacin |
| 17 | Alexandria | 40 | 15,000 | 5 | 14 | Colistine + tylosine |
| 18 | Alexandria | 40 | 5000 | 1 | 5 | Ciprofloxacin |
| 19 | Alexandria | 40 | 5000 | 5 | 10 | Ciprofloxacin |
| 20 | Alexandria | 40 | 10,000 | 1 | 15 | Oxytetracyclin + tylosine |
| 21 | Marsamatroh | 40 | 5000 | 1 | 5 | Oxytetracyclin + tylosine |
| 22 | Marsamatroh | 40 | 5000 | 5 | 12 | Enrofloxacin |
| 23 | Marsamatroh | 40 | 10,000 | 1 | 20 | Ciprofloxacin |
| 24 | Marsamatroh | 40 | 5000 | 1 | 7 | Florfenicol |
| 25 | Marsamatroh | 40 | 5000 | 3 | 2 | Ciprofloxacin |