The pre-immune immunization of swine fever is to vaccinate piglets before they are born, so as to overcome the interference of maternal antibodies, improve the immune protection rate of vaccines, and achieve an effective method for effectively controlling swine fever. For the swine fever pig farm, it is recommended to do the pre-immune immunization of piglets. In order to obtain good results in the pre-immunization of swine fever, the following points must be noted in actual production:

First, the choice of vaccine

The pre-immunization of swine fever uses ordinary cell seedlings, 1-2 heads per serving.

Second, the practical application of the vaccine

1. Vaccination is given before the larvae are eaten after the piglets are laid.

This is mainly to avoid neutralization with maternal antibodies and lead to immune failure.

2. Let the piglet eat colostrum one and a half hours after the vaccination. If the milk is eaten early after immunization, it will cause the vaccine antigen to neutralize with the maternal antibody; if the milk is late, it will lead to the lack of physical strength of the piglet, which is unfavorable for obtaining the maternal antibody earlier to improve the immunity.

3. Inoculate in batches and eat milk in batches. Make a vaccination at one end, and it is best to have a needle for one pig.

4. Prevent the failure of the vaccine. Because the temperature in the delivery room is relatively high, it is best to keep the vaccine in a foam box with ice cubes during the inoculation process to ensure that the vaccine does not deteriorate. The vaccine was diluted with physiological saline and diluted at 4 ° C. A diluted vaccine that requires extra attention will expire in 4 hours, so use up to 4 hours.

Third, the sow aspect

For the delivery room staff, work hard at night, so try to let the sow give birth during the day. The commonly used method is: in the early morning of the 112-113 days of the sow's pregnancy, the sow is intramuscularly injected with 1-2 ml of prostaglandol to concentrate the sows during the day, thereby improving the productivity of the delivery room staff.

In the actual production, the effect of pre-immunization of swine fever is not ideal, and it does not have the effect of pre-immunization of swine fever. Of course, this has a great relationship with immune operation. The author believes that more is the operation in practical application. Some problems that arise during the process. Therefore, the author summarizes the above precautions regarding the pre-immunization of swine fever, and hopes to provide technical reference to the majority of farmers.