What is avian influenza in the immunization control phase of Newcastle disease?

At this stage, breeder farms should take comprehensive prevention and control measures combining immunization, surveillance, grouping, elimination, and strengthened management according to the background investigation results of the disease and the characteristics of the purification disease, so that the clinical incidence of avian influenza and Newcastle disease can be effectively controlled, and gradually realize the immunization and disease-free state, laying the foundation for the next step of non-immunization and disease-free purification. The focus of this stage of monitoring is to reserve chickens to transfer to the group and before the start of production (or before leaving the breed) immune antibody monitoring and pathogen monitoring of sick and dead chickens, to ensure that the breeder flock and individuals have a good immune protection barrier, track the pathogenic infection of the flock, the immune antibody is not qualified breeder flock to strengthen immunization once, 3 4 weeks after the re-sampling of blood testing, in accordance with the elimination plan formulated by the chicken farm, the elimination of the breeder flock after the strengthening of immunization antibody is not qualified. Pathogenological surveillance of dead chickens, positive and found clinical suspected cases of avian influenza or Newcastle disease on pathogenic surveillance, report to local animal disease prevention and control institutions, and collect disease materials in a timely manner to send to provincial epidemic control institutions for diagnosis, if confirmed to occur avian influenza or Newcastle disease, the farm should cooperate with the veterinary department in accordance with the relevant national regulations.

Grasp the infection situation of avian influenza and Newcastle disease in the field, understand the health status and immunity level of the chickens, evaluate the purification cost and manpower and material input, and formulate a purification plan suitable for the actual situation of the farm. Avian influenza disease requires a source of infection, and most people who get the so-called avian influenza disease do not have contact with poultry and eat poultry products, which shows that the disease has nothing to do with contact with poultry and eating poultry products. The so-called human avian influenza disease is actually the first susceptible virus disease, its source of infection is humans, is the virus left by people and patients who do influenza virus vaccines, the virus can survive on the ground for up to two years, if it is inhaled into the respiratory tract, it will be infected under special circumstances in the body.

Avian influenza is an acute zoonotic infectious disease caused by influenza A virus. According to the different pathogenicity, avian influenza viruses can be divided into three categories: highly pathogenic, low pathogenic and non-pathogenic. Highly pathogenic avian influenza is listed as a class A animal disease by the World Organization for Animal Health because of its rapid spread and great harm, and China has listed it as a class I animal disease.

Winter and spring are the high incidence period of avian influenza, to prevent the occurrence of avian influenza, the key is to do a good job in poultry immunization, and to achieve timely immunization to be effective. Timely immunization is to formulate a reasonable immunization time according to the growth and decline of maternal antibodies or autoantibodies in the poultry body, and the breeding poultry farm and rare poultry farm advocate the immunization monitoring of poultry, and then formulate the immunization program suitable for the poultry farm. <>

First, breeders, laying hens.

Primary immunization: 7 days old, 1-2 drops of Newcastle disease-transmission (120) dual vaccine per chicken nasally, and subcutaneous neck of each chicken with Newcastle disease inactivated vaccine.

Second immunization: 60 days old, intramuscular injection with Newcastle disease inactivated vaccine I or Newcastle disease inactivated vaccine.

Booster immunization: 120 days of age, Newcastle disease inactivated vaccine subcutaneously in the neck of each chicken. After the start of production, according to the detection of immune antibodies, 3-4 months with Newcastle disease IV live attenuated vaccine drinking water immunization.

Second, broilers. At 7-10 days of age, 1-2 drops of Newcastle disease-transmission (120) dual vaccine were dropped into the nose of each chicken, and the inactivated Newcastle disease vaccine was subcutaneous in the neck of each chicken.

2017-02-28Author's dream.

1. Clinical symptoms:

1.Newcastle disease is mostly caused by wet cough.

The flu is mostly snoring, and the snoring is dull.

2.Newcastle disease mostly kills skinny chickens, and they die on their stomachs.

The flu kills fat chickens and dies on their backs.

3.Newcastle disease does not cause bleeding from the scales of the legs, but the flu can cause bleeding from the scales of the legs.

4.Newcastle disease does not cause a runny nose, whereas the flu does.

2. Symptoms of autopsy:

1.Leg and pectorals:

Newcastle disease usually does not cause bleeding in the leg and pectoral muscles, whereas influenza can cause claw-like bleeding in the leg and pectoral muscles.

2 Trachea and bronchi:

Newcastle disease has a centimeter-long annular hemorrhage at the intersection of the trachea and bronchi.

Influenza usually manifests as bleeding throughout the trachea, and in severe cases, it can cause mucous exudate or dry blockage in the bronchi.

3.Intrasteral bone:

Newcastle disease can cause spray-like bleeding of the intrasternal bone.

This symptom is usually absent from the flu.

4.Lungs:

Newcastle disease generally does not cause lung lesions.

In severe cases, influenza can cause pneumonic lesions.

5.Spleen:

Newcastle disease usually does not cause splenic lesions, but influenza can cause white necrotic spots or marble-like swelling on the spleen.

6.Kidneys:

Newcastle disease usually does not cause kidney disease, but influenza can cause enlargement and bleeding of the kidneys, and in severe cases, it can be black-brown.

7.Pancreas:

Newcastle disease causes red necrotic streaks on the margins of the pancreas.

Influenza can also cause red necrotic streaks on the margins of the pancreas, as well as pinpoint-sized white necrotic spots with red and white swelling.

8.Duodenum.

Newcastle disease can cause bleeding spots in the duodenum but no bleeding sensation, and influenza can cause bleeding spots in the duodenum with a feeling of bleeding. (However, it usually manifests as diffuse bleeding throughout the intestine).

9.Cecal segments:

Newcastle disease causes one or more pelotae the size of a grain of rice in the cecum.

Influenza does not have this symptom.

10.Bursa Falsus:

Newcastle disease causes mucus in the bursa with pinpoint-like bleeding spots.

The flu usually causes an enlarged burrow, and there are mucus or bleeding spots. (Commonly called flu sacs).

11.Subcutaneous fat in the neck:

Newcastle disease usually does not cause bleeding of subcutaneous fat in the neck, whereas influenza causes pinpoint-sized spots of subcutaneous fat in the neck.

12.Cerebellum:

Newcastle disease can cause cerebellar hemorrhage, and no major distinction is made here.

The symptoms of Newcastle disease in chickens are not the same as those of avian influenza.

There is a certain difference between avian influenza and Newcastle disease, which are two different diseases, avian influenza is mainly caused by infection with avian influenza virus, whereas Newcastle disease is mainly a type of infectious disease caused by infection with Newcastle disease virus. The clinical symptoms of avian influenza are mainly influenza-like symptoms, which can cause systemic poison-like symptoms and respiratory symptoms; Newcastle disease is characterized by high fever, dyspnea, dysentery, neurological disorders, and mucosal serous hemorrhage, which have high morbidity and mortality. Avian influenza is mainly caused by influenza virus infection, and early antiviral**, most patients can**, so it is important to distinguish between the two and not to confuse.