The autumn with large climate change and large temperature difference is the frequent season of respiratory disease in broilers. Under normal circumstances, potential viral and bacterial diseases are potential factors. Sudden weather changes, epidemic prevention stress, and excessive harmful gases are predisposing factors. Under the stimulation of factors, potential factors outbreak respiratory diseases, and the treatment effect of this disease is poor and long, which seriously affects the performance of broiler growth performance and the production efficiency of farmers. Therefore, based on his years of work experience, the author discusses the prevention of respiratory diseases in autumn. Take a look at yourself.
First, the cause of common respiratory diseases in autumn
(1) Viral diseases causing respiratory diseases in broilers
Mild flu (H9) From the perspective of the diseases encountered by the author in recent years, the mild flu is often on the rise after the fall. In most cases, after the occurrence of avian flu, the disease is moderated and the disease gradually develops and spreads. The first diseased flocks have been restored, and the unfamiliar flocks have begun to develop, often resulting in treatment difficulties, long treatment time, and high cost of medication.
Newcastle disease is characterized by phlegm, dyspnea and neurological symptoms. Especially in the case of acute Newcastle disease, a large amount of mucus secreted from the upper respiratory tract of the sick bird flows out from the nose and mouth, and the throat often emits a "snoring and snoring" sound. difficult.
Infectious bronchitis chickens suddenly appear respiratory symptoms after the onset, and quickly involved in the whole group, sick chicken mental depression, feather fluffy, chills, wheezing, cough, sneezing, tracheal vocalization, discharge of secretions in the nostrils, the disease more It is a kidney type lesion, commonly known as "spotted kidney."
(two) bacterial diseases
Septicemia Mycoplasma infection can cause chronic respiratory disease (CRD), which is mainly caused by respiratory symptoms, and is characterized by cough, nasal discharge, respiratory vocalization and mouth breathing. The disease develops slowly and has a long course of disease. It can persist in the flock for a long time and can spread if it encounters stress.
The pathogen of avian cholera is Pasteurella multocida. Once it invades the respiratory tract, it will show respiratory symptoms, characterized by nasal mucus, swelling of the sinus, accumulation of secretions in the throat, and difficulty in breathing.
Salmonella in chickens Salmonella in chickens is common in chicks. Once morbid, the mortality rate is quite high. Most of the chicks suffering from white sputum have respiratory symptoms, which are characterized by fluffy feathers, open wings, and a breath-fastening action in the posterior abdomen. Anatomy can reveal lung abscesses and necrosis.
Escherichia coli has more serotypes and complex disease types. Only when the chicken suffers from air sacs, respiratory symptoms appear.
Second, the immune and drug prevention of respiratory diseases in autumn
(1) Doing a good job of immune prevention in autumn broilers
In particular, it is necessary to immunize bird flu, Newcastle disease, and infectious bronchitis. It is recommended that broilers be injected subcutaneously in the neck of Xinliulian oil seedlings at 5-7 days of age, with 0.5 servings per chicken and new support at the same time. Two to 1.5 live immunizations, in areas where renal infectious bronchitis is prevalent, it is recommended to immunize with infectious bronchitis vaccine with W93 or 491 strain at 3 days of age; immunize chicken Newcastle disease at 19-21 days In the case of vaccines, if the chickens have respiratory diseases, it is best to use intramuscular injection when immunizing. If immunized with drinking water, the vaccine will stimulate the respiratory mucosa, which may easily lead to outbreaks of respiratory diseases. At the same time, according to the situation of the flock, drugs for treating Escherichia coli and mycoplasma can be added. Generally, amikacin is added to the vaccine to control the occurrence of mycoplasma and Escherichia coli.
(2) Do a good job in drug prevention
1. Before and after immunization, drugs for treating respiratory diseases should be added, mainly drugs for controlling mycoplasma, such as macrolides or tiamulin.
2. For the respiratory diseases caused by the cold of the flock, it is necessary to apply antibiotics to prevent the outbreak of bacterial diseases, and to target the flocks, to feed the drugs, such as fever, to give antipyretics, Analgin, aminopyrine, Bupleurum. If the trachea is sticky, it is fed with licorice tablets, ammonium chloride, and bromide. Coughing chickens can be fed with anti-asthmatic and cough-relieving drugs, such as Ma Xing Shi Gan San, Ke Ting Ling and the like. For chickens with bronchial obstruction, aminophylline can be administered.
3. It is best to do drug sensitivity test on antibiotic selection, choose antibiotics sensitive to bacteria, and to improve the recovery of chickens. According to the experience of drug sensitivity test in Henan in recent years, it is generally ciprofloxacin and amikacin. Gatifloxacin is more sensitive. When choosing a drug, be cautious, because if it is a mild respiratory disease caused by avian influenza, the history of the disease is very fast, and the speed of secondary infection is also very fast. Once the drug error is selected, it will cause immeasurable loss.
4. For antiviral drugs, Shuanghuanglian and other traditional Chinese medicine preparations can be selected. In the early stage of chicken disease, Jingfu Baidu San, Yinqiao San, etc. can also be used. The newly developed Chinese medicine extract hypericin is auxiliary to virus-induced respiratory diseases. The treatment also has a good effect.
5. Strengthen the disinfection work with chickens. During the chicken disease, it is necessary to strengthen the disinfection work with chickens once or twice a day. Disinfecting drugs should choose double-quaternary ammonium salt, anti-drug, and poisonous drugs. And diluted with warm water to prevent the cold water from spraying on the chicken to cause the flock to stress, making the respiratory disease of the flock more serious.
6. The general rule of respiratory disease in broiler chickens is that they are generally infected with cold and bacteria before 15 days of age. Chickens after 15 days of age generally have viral diseases, so chickens after 15 days of age should pay attention when adding drugs. Antiviral drugs. In addition, while doing immunization prevention and drug prevention, we must strengthen the management of feeding, strengthen ventilation, and do a good job in temperature and humidity management in the chicken house.
Luggage Wheel Axle,Replace Luggage Wheels,Replacement Wheels For Luggage,Carry On Luggage Wheel
VOLO silent wheel , https://www.volowheels.com