Prevention and treatment of colibacillosis in broilers

If you want to prevent and cure colibacillosis in broilers, you must first understand what colibacillosis is. How did it happen?

Colibacillosis in broilers is an infectious disease caused by Escherichia coli. The disease can occur in chickens of different ages, but chicks are more susceptible, especially in 25-35-day-old chickens. The mortality rate varies greatly according to different feeding conditions.

Environmental hygiene and feeding management of chicken house is an important inducement of this disease. Excessive concentration of harmful gases such as ammonia and carbon dioxide in the air of the chicken house, excessive density of chickens, lack of feeding space and drinking water space, vaccination, transformation and nutritional imbalance can promote the occurrence of the disease.

Colibacillosis in broilers is easy to be co-infected with other bacterial (viral) diseases. When colibacillosis is co-infected with Newcastle disease, infectious bursa, infectious bronchitis and other infectious diseases, it will bring great difficulties to prevention and treatment.

Colibacillosis in broilers is usually characterized by:

1. Stillborn fetus, newborn chick septicemia and omphalitis eggs proliferate in large numbers during incubation after being incubated by Escherichia coli. Most fetuses die in the later stage of hatching or before hatching. Even if hatched, the viability is poor after hatching, showing poor yolk absorption and abdominal distension. Omphalitis, dysentery.

2. Pneumocystitis mainly occurred in 5-12-week-old broilers, and the peak onset period was 6-9 weeks old. Diseased chickens are lethargic, have difficulty breathing, and are accompanied by rales and coughs. Autopsy showed that the air bag was turbid and the wall of the bag was thickened. in the seriously ill patients, there were a large number of white or yellow cheese-like exudates.

3. Yolk peritonitis and salpingitis mainly occurred in adult broilers. Broilers showed dysentery and egg yolk-like substances adhered to the feathers around the anus.

4. the main lesions of hemorrhagic enteritis are gastrointestinal tract, especially small intestinal mucosal bleeding and ulcer. in severe cases, bleeding spots can be seen in serosa, subcutaneous connective tissue, myocardium and liver. Enlargement of thyroid gland and thymus.

Prevention and control of colibacillosis in broilers:

1. Precautions. Strengthen feeding management and environmental disinfection. Strictly control the temperature, humidity, ventilation and ventilation in the chicken house, and reasonably adjust the feeding density and feeding time according to different seasons to ensure the nutritional balance of chickens and improve the disease resistance of the body. From entering the chicken to leaving the pen, the chicken coop, flock, equipment and utensils should be disinfected regularly, especially the chicken house should be fumigated and disinfected, and the cross-matching disinfection method should be adopted. After discovery, it is necessary to isolate and eliminate sick and dead chickens, especially clean up feces frequently, and disinfect chickens with iodine-containing disinfectants at noon every day. The sick and dead chickens were treated innocuously, and the diseased chickens were isolated and treated.

two。 Treatment. Treatment principle: through drug sensitivity test, reasonable selection and use of highly sensitive drugs; take the combined use and cross-use of drugs, it is best to feed two kinds of drugs plus traditional Chinese medicine preparation within one day for treatment; excavate the inducing factors of the disease and cure both the symptoms and root causes. E. coli maintains a state of balance when chickens are healthy. When chickens suffer from other diseases, chickens are in a state of sub-health or disease, which will cause a large number of pathogenic strains to multiply and then be infected with colibacillosis. Microecological agents are added to regulate the pH value of the intestines and stomach and inhibit the growth of E. coli.

The group treatment was treated with the combination of high-sensitive drugs Kanglichi and Hulankang, Kanglichi (ingredient: kanamycin sulfate) for drinking water in the morning and Hogankang (ingredient: lincomycin hydrochloride and spectinomycin) in the afternoon. Probiotics, vitamin An and vitamin C were added to the feed throughout the day, and electrolytic multi-dimensional or quick supplement in drinking water. After 2 days of continuous use, the disease was controlled, and the whole flock of chickens recovered after 4 days.