Control methods of coccidiosis in chickens

Chicken coccidiosis is a common and very serious parasitic disease in chickens. It is an acute epidemic parasitic disease caused by one or more coccidiosis. The economic losses caused by coccidiosis are quite amazing. The incidence and mortality of chickens aged 10~30 days or young chickens aged 35~60 days can be as high as 80%. Let's take a look at the prevention and control methods of chicken coccidiosis.

Etiology of chicken coccidiosis

Different species of coccidiosis have different parasitic sites in chicken intestines and different pathogenicity. Eimeria tenella parasitizes the cecum and has the strongest pathogenicity. Poisonous Eimeria parasitizes in the middle third of the small intestine and is highly pathogenic. Eimeria maxima parasitizes in the small intestine, mainly in the middle part, and has certain pathogenic effect. Eimeria acervulina parasitizes duodenum and the anterior part of small intestine and has certain pathogenic effect. Severe infection can cause intestinal wall thickening and intestinal bleeding. Mild Eimeria, Eimeria harti parasitism in the small intestine front, low pathogenicity, may cause intestinal mucosa catarrhal inflammation. Eimeria precocious parasites in the first third of the small intestine, low virulence, generally no visible lesions. Eimeria brucei parasitizes in the posterior segment of the small intestine, cecum root, has certain pathogenicity, can cause intestinal punctate bleeding and catarrhal inflammation. Eimeria modificata parasitizes in small intestine, rectum and cecum, and has certain pathogenicity. Single plaques containing oocysts appear on serosa and mucosa of intestine in mild infection, and scattered or concentrated spots appear in severe infection.

Symptoms of chicken coccidiosis

Sick chicken spirit depression, fluffy feathers, head curl, loss of appetite, crop filled with liquid, comb and visible mucous membrane anemia, pale, gradually thin, sick chicken often discharge red carrot-like feces, if infected with Eimeria tenella, feces at the beginning of coffee color, later into complete blood feces, if not timely measures, the mortality rate can reach more than 50%. If a variety of coccidiosis mixed infection, feces with blood, and contains a large number of shedding intestinal mucosa.

Prevention of coccidiosis in chickens

1. Chlorphenoguanidine: prevention by 30~33 mg/kg concentration mixed feeding, continuous 1~2 months, treatment by 60~66 mg/kg mixed feeding for 3~7 days, after the prevention amount to control.

2. Aminopyrine: mixed feeding or drinking water administration, mixed feeding prevention concentration of 100~125 mg/kg, continuous for 2~4 weeks. The therapeutic concentration was 250 mg/kg for 1 - 2 weeks, then halved for 2 - 4 weeks. During the application of this medicine, the content of vitamin B1 in each kilogram of feed should not exceed 10 mg, so as not to reduce the efficacy.

3, nitrobenzamide (ball Li Ling): mixed feed prevention concentration of 125 mg/kg, treatment concentration of 250~300 mg/kg, for 3~5 days.

4. Monenmycin: prevention: mixed feeding at a concentration of 80~125 mg/kg.

5. Salinomycin (coccidiosis powder, yousu jing): prevention is mixed with 60~70 mg/kg concentration.

6. Diclazuril: prevention: mixed feeding at 1PPM concentration.

7. Maduramycin (anti-ball king, duqiu, jiafu): prevention is mixed with 5~6 mg/kg concentration.

8, nicarbazine: mixed feed prevention concentration of 100~125 mg/kg, brooding period can be continuously administered.

Treatment of chicken coccidiosis

1. Toltrazuril solution (Kuiwen Poultry Research Institute): therapeutic drug, 500kg body weight/bottle of drinking water, once a day, for 2-3 days.

2. Sulfonamide drugs: superior to other drugs in the treatment of infections, it is often used in the treatment of coccidiosis. Sulfonamide drugs are prohibited for export commodities broilers.

① Compound sulfa-5-methoxypyrimidine (SM-TMP), mixed at 0.03% for 5~7 days.

(2) Sulfaquinoxaline (SQ), mixed feed at the concentration of 150~250 mg/kg or drinking water at the concentration of 50~100 mg/kg for prevention, mixed feed at the concentration of 500~1000 mg/kg or drinking water at the concentration of 250~500 mg/kg for treatment for 3 days, 2 days after withdrawal, and 3 days after withdrawal. Chicken over 16 weeks of age should be restricted to use. Combined with aminopyrine, it has synergistic effect.

(3) Sulfamethoxine (S days M), mixed feeding at 125~250 mg/kg for prevention, continuous use for chickens under 16 weeks of age, mixed feeding at 1000~2000 mg/kg for treatment or drinking water at 500~600 mg/kg for 5~6 days, or 3 days, 2 days off and 3 days again.

4. Sulfamethazine (SMM, day S-36, probiotics), mixed feed at a preventive concentration of 100~200 mg/kg, treatment at a concentration of 100~2000 mg/kg mixed feed or 600~1200 mg/kg drinking water, for 4~7 days. Combined with pyrimethamine has synergistic effect.

5 Sulfamethazine (SM2), mixed feeding at a concentration of 2500 mg/kg or drinking water at a concentration of 500~1000 mg/kg for prevention, mixed feeding at a concentration of 4000~5000 mg/kg or drinking water at a concentration of 1000~2000 mg/kg for treatment for 3 days, withdrawal for 2 days, and then use for 3 days. Chickens over 16 weeks of age are restricted.

6 Sulfacloropyrazine (Esb3), mixed feed at a concentration of 600~1000 mg/kg or drinking water at a concentration of 300~400 mg/kg for 3 days.