Comprehensive control of viral diseases in broilers in winter

Into the autumn and winter, the weather gradually cool, due to the weather, broiler viral diseases will be rampant. In broiler clinical disease, viral diseases mainly include influenza, Newcastle disease, infectious bronchitis and so on. After the outbreak of chickens, the body's resistance will decrease, and the susceptibility to other pathogens will also increase, and mixed infection will often occur, and the loss caused is self-evident. Based on many years of experience, the author reports the comprehensive prevention and control of viral diseases in broilers during this period as follows for the reference of colleagues and broiler breeders.

Into the autumn and winter, the weather gradually cool, due to the weather, broiler viral diseases will be rampant. In broiler clinical disease, viral diseases mainly include influenza, Newcastle disease, infectious bronchitis and so on. After the outbreak of chickens, the body's resistance will decrease, and the susceptibility to other pathogens will also increase, and mixed infection will often occur, and the loss caused is self-evident. Based on many years of experience, the author reports the comprehensive prevention and control of viral diseases in broilers during this period as follows for the reference of colleagues and broiler breeders.

1. Causes of viral diseases in broilers.

1.1 to weather factors in autumn and winter, the weather gradually becomes cooler, and the virus is particularly rampant at this time. When there are loopholes in the feeding and management of breeders, the chicken flock is in a subclinical state for a long time, and the accumulation of the virus in the body to a certain amount will cause the disease.

1.2 feeding management factors

1.2.1 Disinfection is not complete and biosafety measures are not paid attention to. Many farms and households do not pay attention to disinfection and think that the effect is invisible. Disinfection is just a simple formality, which makes the virus left over from the last batch of chickens continue to survive, even increases its virulence. A little mismanagement will make chickens sick.

1.2.2 Feeding Management Loopholes Frequent Low humidity in the early stage of feeding makes dust and small villi fly everywhere in the house. Chickens breathing these dust will cause great stimulation to respiratory mucosa, causing respiratory tract injury, and viruses will invade in the injured part. Poor ventilation in the house and high concentration of harmful gases such as ammonia will inevitably lead to decreased immunity and increased susceptibility to viruses when broilers grow in this environment for a long time; in autumn and winter, the windows and doors are closed. In order to increase the ventilation, the breeders are over-ventilated. The thief wind and the through-hall wind in the chicken coop cause the chicken to catch a cold.

1.3 Epidemic Prevention Factors When preventing broiler chickens from epidemic prevention, we must ensure that healthy chickens and unhealthy chickens do epidemic prevention. One will cause immune failure, and the other will make the diseases of chickens more complicated and severe. This often happens in broilers clinically, especially the Newcastle disease vaccine at the age of 21 days. If the vaccine is not well prevented, the mortality rate will be greatly increased. Many farms dare not make the vaccine at the age of 21 days.

1.4 Immunosuppressive Diseases Exist Widespread The multiple and universality of broiler diseases are closely related to immunosuppressive diseases. Various viruses (such as Marek's disease, avian leukemia, infectious bursal disease, infectious anemia, reticuloendotheliosis, etc.) and other immunosuppressive factors (such as mold, cryptosporidium, stress, some drugs, malnutrition, etc.) can cause damage to the body's immune organs and tissues, as a result, the body's temporary or permanent immune response is not fully functional and highly susceptible to disease.

The main pathogens of broiler viral diseases caused by 1.5 pathogenic factors are Newcastle disease virus, avian influenza virus, infectious bronchitis virus and so on. In broiler clinical, often appear virus mixed infection with bacteria mostly. Such as "air bag inflammation", "bronchial embolism" and mycoplasma, nasal tracheal avian bacteria, Escherichia coli, virus and so on.

2. Comprehensive control of viral diseases in broilers

2.1 Strengthen feeding management, remove stress factors in the process of broiler breeding, should be the correct control of ventilation, feeding density, temperature and humidity and other management factors, to create a comfortable environment for chickens. In autumn and winter, in the early stage of broiler breeding, ventilation should be ensured under the premise of heat preservation; the relative humidity in the house must meet the standard requirements to prevent respiratory symptoms caused by dust; epidemic prevention must be done for healthy chickens. During the epidemic prevention period, attention should be paid to taking good quality multi-dimensional (nano-Jinwei). After epidemic prevention, timely drinking of anti-related drugs and preventive administration should be aimed at possible diseases. Drinking compound astragalus polysaccharide and yikangbao to enhance the body's resistance and immunity; Strengthen disinfection and select disinfectant with small stimulation (such as Zhongren Jin iodine and stili disinfectant) to disinfect chickens.

2.2 lifting immunosuppression In the current broiler breeding process, the damage of immunosuppressive diseases is becoming more and more serious. Although there are almost no specific drugs to treat viral immunosuppressive diseases in clinical practice, the medication program is arranged to take compound astragalus polysaccharides and Yikangbao to improve the body's resistance and immunity. It is of great help. In response to mold and mycotoxins, demildew agents (mold I, mullanbao, meiyijing, etc.) can be added to the feed regularly in the early stage of broiler breeding (within 25 days of age).

2.3 treatment for respiratory diseases treatment principles: antiviral prevention of secondary infection, lifting immunosuppression, symptomatic treatment.

2.4 adjuvant therapy in the process of adding multi-dimensional (nano Jinwei), cod liver oil can increase the barrier function of mucosal cells, VE has antioxidant function, but also can promote antibody production, VC anti-stress, improve immunity, but also can improve the body's mucosal immune barrier, so that the body's specific and non-specific immune function can be greatly improved. In the season of high incidence of respiratory diseases or when treating respiratory diseases, adding these vitamins can achieve twice the result with half the effort.