Detailed Explanation of Vaccination Methods and Precautions for Wild Ducks

The wild duck is a typical representative of waterfowl; the wild duck is the common name for the mallard in the Northern Hemisphere. The wild duck belongs to the class Aves, order Anseriformes, family Anatidae; its numbers are very large, and it is a general name for many kinds of wild ducks, with more than ten species. Wild ducks are capable of long-distance migratory flight, with a maximum flight speed of up to 110 km per hour. In the narrow sense, the wild duck refers to the mallard, also known as the big green head, big red-legged duck, big hemp duck, etc. It is the most common large wild duck and the ancestor of all domestic ducks except the Muscovy duck, and is currently the main target of artificial domestication. Disease prevention in wild duck farming is very important, so how should wild duck vaccines be administered, and what precautions are there?

Under artificial farming conditions, wild ducks can be threatened by various infectious diseases at any time. To take preventive measures, healthy wild duck flocks should be vaccinated preventively on a planned basis during normal times. There are many types of vaccines used for wild ducks, and they should be selected for use according to the specific conditions of the farm. The routes of vaccination vary, and the methods include subcutaneous or intramuscular injection, skin puncture, eye drop, nasal drop, spray, drinking water, and mixing with feed. The appropriate method should be adopted according to the vaccine instructions. In order to give full play to the proper effect of the vaccine, two major issues should be understood: the characteristics of the vaccine and the immunization program:

Precautions for preventive vaccination

Pay attention to the storage environment of the vaccine, especially live bacterial vaccines and live vaccines, which must be refrigerated at low temperature. During storage, prevent the temperature from fluctuating between high and low, and refrigeration equipment is required during transport. During use, the vaccine must not be placed near high temperatures or exposed to direct sunlight.

Before use, inspect each bottle one by one, paying attention to whether the vaccine bottle is damaged and whether the seal is tight. The batch number and inspection number of the vaccine on the bottle label should be noted so that problems can be traced.

Pay attention to disinfection. For example, syringes, needles, droppers, and dilution bottles must all be washed clean beforehand and boiled for disinfection before use. Needles should be replaced frequently. For poultry farms where epidemics are prevalent, one needle should be used per bird. When drawing the vaccine liquid, if the vaccine in the bottle cannot be drawn all at once, do not pull out the needle from the bottle so that drawing can continue. Never use a needle that has been injected into a bird to draw vaccine liquid, so as to avoid contaminating the entire bottle of vaccine.

For vaccines that need to be used after dilution, calculate the dilution ratio according to the specified number of doses per bottle and the injection dose. Commonly used diluents include sterilized physiological saline and aluminum hydroxide solution, etc., while some vaccines come with a dedicated diluent. Vaccines that have been opened or diluted must be used up the same day, and hot diluent must never be used to dilute vaccines.

For drinking water immunization, first pay attention to water quality. If tap water is used, it should first be stored in a vat in advance and used only after the chlorine has volatilized. It is best to add 0.2% skim milk powder. There should be sufficient drinkers, the containers should be clean, and various metal containers must not be used. Water should be withheld before drinking; 1-2 hours in summer and 2-3 hours in winter. The drinking water amount per bird is determined by the size of the bird, generally 10-15 ml, and it is required to be finished within half an hour.

Vaccination is for the prevention of infectious diseases. Therefore, the corresponding vaccine must be used on the premise of understanding the epidemic situation and prevalence in the poultry flock, and at the same time the flock must be in a healthy state before vaccination. Poultry that are currently diseased or unhealthy should temporarily not be vaccinated.

If an acute infectious disease is detected early in the flock, emergency preventive vaccination can be carried out, but diseased poultry should be removed. When vaccinating assumed-healthy poultry, the needle should be changed for each bird. Emergency vaccination has no preventive effect on diseased poultry already in the incubation period. Generally, after 1 week the epidemic will subside.

Correct immunization procedures must be implemented. Different vaccines should be used to prevent different infectious diseases. Even when preventing the same infectious disease, sometimes vaccines of different strain types or types should be selected according to specific circumstances. Because factors such as the age of the poultry, the level of maternal antibodies, and the type of vaccine are not all the same, this must be handled according to different circumstances. Condition-permitting poultry farms can formulate and implement correct immunization programs based on immunization monitoring results, so as to give full play to the immunity of the vaccine.

After immunization and vaccination, feeding management should be done well to reduce and avoid various stress factors, prevent the invasion of pathogens, and enable the body to produce sufficient immunity.

At present, commonly used poultry vaccines include attenuated vaccines and inactivated vaccines. Generally speaking, attenuated vaccines produce immunity quickly, and such vaccines must be stored frozen at low temperature. Oil-emulsion vaccines produce longer-lasting immunity and have less strict requirements for storage temperature.