In recent months, when I visited the market, many pig farm owners reported to me some headaches in recent pig farms: sow abortion, stillbirth, repeated infertility or death, diarrhea, respiratory and nervous system symptoms of newborn piglets, and casualties after 3-4 days of postpartum survival. The proportion of pig farms is not small. Many pig farmers are at a loss about this. Obviously, they have been vaccinated and used health care drugs. Why is this happening?
To know the specific reasons, we have to start from the actual situation of several pig farms.
{Pig farm case 1}
In a pig farm in Liaocheng, the pig was born healthy and died three days later.
Breeding situation: there are more than 30 sows/kloc-0. 20 17 10 17 The owner of the pig farm called and said that the piglets produced by sows were healthy for 2-3 days in recent days. Three days later, the piglets began to have diarrhea and then died. Sows with serious illness will produce many stillbirths, and the proportion of surviving piglets is not large, but the clinical symptoms of sows are not obvious. The next day, the author went to the pig farm to check the actual situation and communicate with the boss about the pig farm. The boss told me that the vaccine was well done and the types of vaccines injected were complete. The author then dissected several dead piglets and sent them to the laboratory of the Institute of Animal Disease Prevention and Control of Liaocheng University for testing.
Piglet after death
Perform an autopsy in the laboratory
First Inspection Report of Pig Farm (20 17 10 18)
Test material: blood sample 5
Detection method: standard kit ELISA and classical swine fever colloidal gold detection card were used.
Project: blue ear antibody and antigen; Antibodies and antigens of classical swine fever; Pseudorabies gE antibody
Instrument: American BIO-RAD M680 automatic enzyme-labeled instrument.
ELISA test results:
1.80%(4/5) samples were blue ear antibody positive, and the antigen was basically negative.
2. All the cyclic antibodies in the sample are positive.
3. The antibody of classical swine fever is basically positive, and 40%(2/5) antigen is negative.
4. The samples of pseudorabies were positive for gE antibody.
Judge:
(1) If neither the blue ear nor the ring can be immunized, it means that the wild poison is generally infected.
(2) Classical swine fever is basically normal, and some of them have the problem of wild virus infection. It should come from the mother.
(3) All pseudorabies antibodies are positive, indicating that there is wild virus infection.
Summary: There were blue ear, ring and pseudorabies wild virus infections before, and the infection was serious. Plus the pressure of the new environment. Seriously ill.
Suggestion:
(1) Increase the immunity of blue ear disease and circovirus vaccine.
(2) Adjust the immunization program of pseudorabies or replace it with a new vaccine.
Attachment: Original results of antigen-antibody detection
* Black is the positive electrode and red is the negative electrode.
{Pig Farm Case 2}
In Puyang pig farm, Henan province, suckling pigs die quickly and sows are repeatedly infertile.
Breeding situation: There are more than 65,438 sows. Suckling pigs will die when they have no clinical symptoms, and the mortality rate is fast and high. Sows are infertile after repeated mating, and some even miscarry. The probability of miscarriage is between 10- 15%. In the process of communicating with the boss, I learned that there is no problem in epidemic prevention in pig farms. The epidemic prevention program has been used for several years, and the vaccines are the products of big companies. Epidemic prevention should be done in place. 165438+1October 26th, the author drew blood to the Animal Disease Control Institute of Liaocheng University for testing.
Report on the Second Inspection of Pig Farm (20 17 1 129)
Test material: blood sample 5
Detection method: standard kit ELISA and classical swine fever colloidal gold detection card were used.
Projects: blue ear antibody, classical swine fever antibody, pseudorabies gE, national standard antibody and ring antibody.
Instrument: American BIO-RAD M680 automatic enzyme-labeled instrument.
ELISA test results:
1. The samples of sows were positive for antibodies against classical swine fever, blue ear and circular ring, but the antibodies were normal. The sow samples were positive for pseudorabies antibodies gB and gE. Indicates a wild virus infection.
2. Blue-eared piglets and pseudorabies were positive for gB antibody, but negative for gE antibody.
3. Piglet samples were weakly positive for antibodies against classical swine fever and circovirus.
Judge:
1. The antibody level of swine fever, blue ear disease and ringworm disease in sows is sufficient and the immunization is effective; If all the above vaccines have been immunized normally, it means normal.
2. Pseudorabies virus is positive, so it is suggested to replace the non-Bartha classic strain vaccine.
3. The antibody levels of swine fever, circovirus and pseudorabies in piglets are not high, so it is suggested to strengthen immunization. Among them, the antibody level of piglets with mites is low, which is 1. (I don't know which immunization time it is, you can also use some good immune enhancers, such as transfer factors and astragalus polysaccharides. )
Conclusion: It is mainly pseudorabies wild virus infection.
Attachment: Original results of antigen-antibody detection
* Black is the positive electrode and red is the negative electrode.
{Pig Farm Case 3}
In Puyang pig farm, Henan province, the sow suddenly miscarried.
Breeding situation: There are more than 80 sows on hand. Recently, sows in pig farms have no clinical symptoms and suddenly miscarry. More than a dozen sows have had abortion symptoms. The author communicated with the boss and learned that swine fever, blue ear disease, pseudorabies and ring vaccine have all been injected.
Let's look at the actual situation through the laboratory test results:
Report on the Third Inspection of Pig Farm (20 17 1203)
Test material: blood sample 6
Detection method: ELISA with standard kit was used for detection.
Project: national antibody against classical swine fever, ring, blue ear disease and pseudorabies.
Instrument: American BIO-RAD M680 automatic enzyme-labeled instrument.
ELISA test results:
1. sow samples 1, 3, 4 and 5 were positive for classical swine fever, pseudorabies gB and blue ear disease, and the immunization was effective.
2. Piglet samples were gB positive for classical swine fever and pseudorabies, and the immune effect was good.
3. The samples of swine fever and pseudorabies gB piglets were all negative and had no immune effect.
4. It is suggested to strengthen the ring immunization or replace the ring vaccine except that the sample ring is weakly positive and the sample ring is negative.
Conclusion: Combined with the chief complaint, when the gB of pseudorabies is normal, it appears abortion or instability, suggesting the existence of gE wild virus infection (although it has not been detected). Low circulating antibody level is the secondary cause.
Suggestion: Adjust the immunity of pseudorabies.
Attachment: Original results of antigen-antibody detection
* Black is the positive electrode and red is the negative electrode.
According to the recent incidence and laboratory testing of pig farms, there are indeed some epidemic prevention loopholes and unscientific places in pig farms, which lead to the continuous emergence of diseases that can be reduced through epidemic prevention in our pig farms. However, there are accidents in sow production, which lead to the decline of sow production performance and the benefit of pig farm.
Why do pigs in pig farms get sick after vaccination?
Why can't epidemic prevention according to epidemic prevention procedures obviously improve the biological safety of pig farms?
According to the analysis of laboratory test results and clinical manifestations of pig farms, if pig farmers want to achieve correct and effective epidemic prevention, the following suggestions are worth considering:
1. It is best to do antibody and antigen tests twice a year to judge whether our epidemic prevention procedures and types are in line with the actual situation of our pig farm. Sows and suckling pigs can draw blood at the ratio of 8- 10%.
2. Make sure that there is no mycotoxin in the feed fed by the pig farm, especially the customers who make their own ingredients. It is also necessary to detect the mycotoxin content of raw materials and control the quality of raw materials. Mycotoxin has a great influence on the health and epidemic prevention of pigs.
3. It is necessary to ensure that the feed is comprehensive and balanced, and the feed can meet the nutritional and physiological needs of pigs in the growth stage, so as to make pigs healthy. Therefore, large companies must be selected for feed: high-tech formula, advanced processing technology, quality-guaranteed raw material sources, and sophisticated testing equipment. Only by having these can the quality be guaranteed.
4. In order to improve the immune effect, it is obvious to add immune synergist during epidemic prevention. The epidemic prevention objects shall conform to the epidemic prevention stage and meet the requirements of epidemic prevention for animal health.
In order to have a good epidemic prevention effect, the quality of vaccine is very important.
(1) Choose a large company with R&D capability and production qualification.
(2) The logistics process of vaccines is also very important. Vaccines should be selected from units capable of correctly preserving vaccines. After we buy it, we should also keep it according to the manufacturer's requirements.
(3) Vaccine epidemic prevention should be correct: correct injection site, correct injection equipment and correct injection dosage.
Teacher Feng Zhujing
About the knowledge of raising pigs, enjoy the harvest of farming.
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