The common cause of sows in pig farms, coughing and death is that there are problems with the blue ear control in the pig herds. It is difficult to purify and eradicate blue ear virus diseases and swine fever without special medicines. In addition to improving the health of the pig herds, is also needed to establish immunity through vaccine immunity.
timely fine-tune the immune program according to the antibody detection report, which plays an important role in the prevention and control of related epidemics. At present, most testing institutions use the US IDEXX antibody detection kit to evaluate the immunity effect of the vaccine. So, how do you view the test report data obtained by ?
1. Data meaning on swine fever and blue ear antibody test report
1. Swine fever (CSFV) antibody test report judgment instructions
① Antibody positive rate (evaluated by blocking rate)
The presence of swine fever (CSFV) antibodies does not necessarily mean that there is protection. However, samples with blocking rate Blocking%≥50% can be considered as protection. In a sense, the greater the blocking rate, the better the clinical protection effect.
② Coefficient of variation (dispersion CV)
Coefficient of variation represents the change of the average individual, and the neatness of the measured antibodies is feedback on the antibody evaluation. If CV is ≤40%, it means that the antibody level is stable and the immune effect is good. If CV is > 40%, the immune procedure needs to be readjusted or other reasons.
judgment summary:
avoid swine fever, the blocking rate should be >50%, the pass rate of herd immunity positivity rate ≥85%, and the dispersion of antibody of breeding pigs is ≤20% (commercial pigs ≤25%).
2. The judgment of the blue ear (PRRS) antibody test report
stipulates in the national mandatory immunization plan that in order to control swine fever, pig breeding and respiratory syndrome disease, the most ideal antibody positive rate in the pig herd should be above 90%; the average S/P value of the antibody is 1.0-2.0; the dispersion distribution is 50-70.
If the S/P value in the population is ≥2.5, this type of pig only needs to be isolated and domesticated to achieve a stable antibody level; if the S/P value in the population is ≥3.0, the pigs may have wild poison infection, and this type of pigs will be eliminated in time and cannot be admitted to the group.
2. See the data for example
The following discussion is carried out with the pig farm swine fever and blue ear antibody detection report as an example and supplemented by examples for reference by farmers and friends. Data processing and analysis of the test results of swine fever antibody
1 and swine fever antibody
Table 1 and Figure 1Test results show that the positive rate of swine fever antibody in the three stages of pre-pregnancy, delivery sows and empty sows is relatively high, the average blocking rate is relatively large (all >50%), the coefficient of variation is small (all <40%),>
Among them, the antibody to swine fever in delivery sows and empty sows is negative. The immune expression effect of sows may be poor at this stage. At the same time, it is necessary to pay attention to the operation during the sow general exemption process; in the reserve sow stage, the average blocking rate is lower than 50%, and the coefficient of variation is large (CV>40%). The introduction of reserve sows needs to be paid attention to. Data processing and analysis of the antibody results of blue ear disease in pigs
2 and Pig Blue Ear Disease
Table 2 and Figure 2The data results show that according to the positive rate of blue ear disease antibody level of more than 80% is that all breeding pigs are immune qualified. Only boars and sows with more than 6 births in the pig farm have met the immune qualification standards, with S/Ps of 1.767 and 1.786 respectively, and there is a possibility of recent infection or infection; 3-5 births, 1-2 births, 3-week piglets, and 7-week piglets have not met the immune qualification standards, which is risky.
During the production process, if a certain proportion of sows in the sows had miscarriage in the later stage of pregnancy, the sows had abnormal estrus, and the recurrence rate was too high and the recurrence rate was too high; piglets in the delivery room had diarrhea; pigs with severe cough and asthma, and the death rate was high; pig breeding grew slowly, and a certain proportion of stagnant pigs appeared,
Recommendation:
3 1 Strengthen prevention and control, timely drug health care (Health Source 4KG/T+20% timikaoxin 2KG/T for 2 consecutive weeks) and vaccine immunization to avoid the epidemic of blue ear disease.
3. Summary
In short, in breeding, it is necessary to follow the prevention and control principle of "raising more than prevention, prevention more than treatment, and raising more than prevention and control", and supervise and prevent diseases of pig herds from all aspects of production.
swine fever and blue ear are both immunosuppressive diseases of pigs. Therefore, pig farms should optimize the immunization procedures and pay attention to the mutual influence between vaccines (swine fever blue ear cannot be immunized at the same time) during the immunization process. It is best to have a certain interval (≥7 days) to strengthen the immunization of swine fever vaccine and blue ear vaccine, and conduct regular antibody level testing to ensure that the antibody level is qualified.
