Veterinary drug knowledge | The application methods and suspension periods of commonly used drugs in the chicken industry

The drug suspension period refers to the time from the last administration of the drug to the time of slaughter, after the drug is excreted, the amount of residue in the tissues of the body does not exceed the food hygiene standards. Slaughter and sale are not allowed during the period of suspension. In the chicken industry, especially in the broiler breeding industry, it is necessary to use drugs rationally in strict accordance with the provisions of the drug suspension period to ensure that the drug residues in the chicken do not exceed the food hygiene standards, otherwise, it will make the broiler chicken and its products unable to enter the market, and may also lead to contract disputes, causing undue losses to the enterprise.

The following are the provisions of the drug suspension period and application restrictions for drugs commonly used in the chicken industry

1. Oxytetracycline: used for broiler chicken, can be used in mixing, the dosage is (50 ~ 100) × 10-6, no drug suspension period requirements; but when injected, the drug break period is 5 days.

2. Chlortetracycline: for broiler chicken, mixing, dosage of 500×10-6, drug break period of 1 day; when drinking water administration, the drug break period is 4 days. The permissible residue in meat, liver, fat, skin is 1×10-6.

3. Erythromycin: can be used for layer chickens and broilers of all ages, taking drugs internally, the concentration when mixed drinking is 0.01%, continuous drinking for 3 to 5 days, when injecting drugs, according to 10 to 40 mg per kg of body weight, 2 times a day. The withdrawal period is 1 to 2 days. The allowable residue in eggs is 0.025 ×10-6. Concentrations above 185× 10-6 are contraindicated in laying hens.

4. Spectinomycin: for broiler chickens, taking medicine internally, the drug suspension period is 5 days.

5. Gentamicin: used in layer chickens and broilers of all ages, can take medicine internally, intramuscular injection, the dosage is 3000 units per kg of body weight, 3 to 4 times a day. The period of withdrawal is 35 days.

6. Neomycin: for broiler chickens, taking medicine internally, when mixing, add 0.1~0.3g of neomycin per liter of water, and use it for 4~7d. The period of withdrawal is 4 days.

7. Sulfa chloropyrazine: for broiler chicken, drink water administration, with a concentration of 0.03%, drink for 3d. The period of withdrawal is 5 days.

8. Sulfadimethylpyrimidine: for broiler chickens, it can be fed with a concentration of 0.5%, or administered with 0.2% concentration of drinking water, continuous for 3d, discontinued for 2d, and then used for 3d. The period of withdrawal is 10 days. The permissible residue in the product is 0.1×10-6. This product is banned in laying hens.

9. Sulfamethoxypyrimidine: for broiler chickens, drinking water administration, concentration of 0.05%, continuous use for 6 days. The period of withdrawal is 5 days. Japan stipulates that the maximum residue amount in chicken is 0.01×10-6.

10. Trimethoprim trimethoprim: for layer chickens, broilers of all ages, intramuscular injection or internal administration, the injection dosage is 20 ~ 25mg per kg of body weight, every 12 ~ 24 hours of medication once, when mixed drinking, every 5000 mL of water to add 1 mL trimethoprim trimethoprim injection. The period of withdrawal is 5 days.

11. Sulfamethoxypyrimidine + dimethoxybenzyl trimethoprim: for broiler chickens, can be administered with drinking water, the dose is 20 to 25 mg per kg of body weight when administered internally, the dosage is used twice a day, and the concentration requirement at feeding is: 1 to 5 days old 10 mg, 6 to 10 days old 15 mg, 10 to 17 days old 20 mg, or 0.02% mixed feed. The period of withdrawal is 5 days. The allowable residue in meat is 0.1×10-6. The use of this product is prohibited in laying hens.

12. G ball: used for broiler chicken, according to the proportion of 0.0125% mixing feed, the drug break period is 5d. The allowable residue in the liver and kidneys is 15×10-6, and the allowable residue in meat is 5×10-6. Chickens over 16 weeks of age are banned from this product.

13. Chlorobenzine: used in broilers, mixed feeding, the drug suspension period is 5 days. The allowable residue in the skin and fat is 0.2×10-6, and the allowable residue in other tissues is 0.1×10-6. This product is banned in laying hens.

14. Amphetamine: for broiler chickens, it can be fed with a concentration of 0.0125% to 0.024%, or with 0.006% to 0.024% of drinking water, continuously used for 7 days, and then the drug concentration is reduced by half, and used for 14 days. The period of suspension is 7 days. The allowable residue in meat is 0.5×10-6, and the allowable residue in the liver and kidneys is 1×10-6. This product is banned in laying hens.

15. Bulbophyllum dysentery (dinitrobenzamide): the product is less toxic, the safety range is large, is an ideal drug for the prevention and treatment of chicken Amyococcus, used in layer chickens of all ages, broilers, mixed feeding concentration of 0.0125%, mixed drinking concentration of 0.015%, feeding concentration of 0.025% to 0.03% during treatment, and used for 3 to 5 days. Although there is no requirement for the drug suspension period, the allowable residue in fat is 2×10-6, the allowable residue in muscle is 3×10-6, and the allowable residue in liver and kidney is 6×10-6.

16. Nicarbazine: for broilers, mixed feeding, the dosage is 0.0125%, and the drug suspension period is 4d. This product is banned in laying hens. Japan stipulates that the maximum residue amount in chicken is 0.02×10-6.

17. Furazolidone: for broiler chicken, mixing feeding, treatment, feeding concentration of 0.04%, prevention feeding concentration of 0.005% ~ 0.01%, can be used for 7 ~ 10 days. The period of withdrawal is 5 days. This product is banned in laying hens and chickens over 14 weeks of age.

18. Sulfaquinoxoline: for broiler chickens, intermittent administration is the best when treated, feeding with 0.1% concentration mixture, continuous use of 2 to 3d, intermittent 3d, and then feed with 0.05% concentration of mixture, continuous use of 2d, intermittent 3d, and then feed for 2d; or with 0.04% concentration of drinking water, continuous drinking 2d, intermittent 3d, and then drink for 2d. It is fed with a mixture of 0.012% concentration or with a drinking water of 0.005% concentration. The period of suspension is 7 days. This product is banned in laying hens. Japan stipulates that the maximum residue in chicken is 0.05× 10-6.

19. Nitrochlorobenzamide: used in broilers, mixed feeding, the drug suspension period is 5d. The allowable residue in the liver and muscle is 4.5×10-6, and the allowable residue in the skin and fat is 3×10-6. This product is banned in laying hens.

20. Monensin: used in broilers, mixed feeding, commonly used concentration of 0.0125%, the drug break period is 3d. The allowable residue in meat is 0.05×10-6. This product is banned in laying hens.

21. Chlorohydroxypyridine (cute dan): the product has low toxicity, both broilers and laying hens can be used, mixed feeding, the drug concentration of chlorohydroxypyridine is 0.0125% ~ 0.025%, cute dan is 0.05% ~ 0.1%, and the drug suspension period is 5d.

22. Madumycin: can be used in layer chickens and broilers of all ages, commonly used 1% madumycin master mix, mixed feeding, dosage of 0.05%, drug break period of 5 days.

23. Methylhydromycin: first successfully developed by the United States, can be used for layer chickens and broilers of all ages, is the only anticoccidial drug that can be used for breeders and laying hens so far, mixed feeding, the dosage is 1000kg of feed plus 60 ~ 70g, no endless drug period requirements.

The above are Western medicine preparations, which are also known as antibiotics. Pure Chinese medicine is non-toxic and antibiotic-free, no drug residue, does not involve these problems, farmers can use it with confidence.