With the rapid development of the layer cage breeding industry, the breeding level of breeding friends has also improved. However, in the actual layer production process, there are six misunderstandings in the understanding of layer viral disease immunity: layer breeding equipment

Misunderstanding one

Some people think that "everything is going well" after the vaccine is immunized, and basically does not do antibody testing, and do not evaluate whether the chicken antibodies can effectively resist the virus attack. After detecting antibodies, only the average number is looked at, and the antibody uniformity is ignored. In fact, the disease of chickens is caused by uneven antibodies. Chickens with low disease resistance are prone to infection and disease. After some chickens become ill, the disease gradually spreads and eventually leads to the disease of the whole group.

Misunderstanding 2

Vaccines with different strains are used for the first, second and re-immunization. It is always believed that the protection rate of using a few more strains will be better. In fact, on the contrary, the antibody needs to be repeatedly immunized to be significantly improved. For example, our children are vaccinated with hepatitis B vaccine as soon as they are born, and then repeated immunization with the same vaccine one month and six months later can produce effective antibodies.

Misunderstanding three

Too much care about the price of vaccines, only to control the cost of immunization. Must choose effective products, combined with antibody testing, scientific immunization is the way to control costs, products that can solve problems are cheaper products, and solutions that can solve problems are the methods.

Layer breeding equipment

Misunderstanding four

Most people think that high-temperature viral diseases will no longer occur, so many people relax their vaccination in summer. Through a large amount of laboratory data analysis, it is found that viral diseases are still prevalent in summer, but they are lighter than winter and spring. If supplementation is not paid attention to in summer, the antibody level of the chickens is low, and the heat stress is strengthened. The chickens have insufficient feed intake for a long time and lack of nutrition. After autumn, the temperature difference between day and night will increase, and viral diseases will be prevalent. The cause of the high incidence of diseases in autumn and winter, so the immunity in summer cannot be relaxed.

Misunderstanding 5

It is thought that antibodies will be produced after the vaccine is immunized. In fact, it is not the case. Take Newcastle disease as an example. About 4 (the critical value of onset). At this time, the time for immunity is good. After that, the antibody slowly rises, but the increase is not large, generally 5-6, and lasts until about 45 days old. Therefore, chickens aged 35 to 45 days need to be carefully taken care of, otherwise they will There is a problem. At this time, once the onset is a typical case, the antibody will rise sharply after 45 days of age. This is the law of antibody production.

Misunderstanding 6

I don’t understand the role of freeze-dried vaccines and oil vaccines, and the immunization program settings are unreasonable. Here are the different functions of vaccines. After immunization, freeze-dried vaccines mainly produce local mucosal antibodies. Respiratory tract virus (Newcastle disease, spreading, etc.) vaccines contact the upper respiratory tract mucosa, stimulate the respiratory tract mucosa to produce cellular immunity, and generate local mucosal antibodies, which can prevent this type of virus infection. Like the national defense forces to prevent foreign enemies from invading, the freeze-dried vaccine spray has better immunity, followed by eye spot immunity, and drinking water immunity is the worst. After oil vaccines are injected, antigens are slowly released, and they mainly produce body fluid antibodies, which are the antibodies we often test. They are the main force against disease and infection. Taking into account the stress response and vaccine absorption problems caused by oil vaccine injections, the method of oil vaccine immunity is the neck Subcutaneous injection has low stress response and fast absorption. Chest muscle injection has a large stress response and is not easy to absorb. Leg muscle injection has the worst effect and has a large stress response, which is not conducive to the health of chickens. In addition, the oil vaccine should be pre-warmed with warm water before injection to make the vaccine temperature rise to 35-38 degrees. In summary, the freeze-dried vaccine and the oil vaccine play different roles and require joint immunization.