When people used to raise pigs, pigs took longer to eat breast milk, and they could not worry about the stress reaction caused by weaning. In the modern intensive pig production, piglets are getting younger and weaner, and weaning is more sudden. Under the conventional modern production mode, the weaning age should not be earlier than 4 weeks. Piglets weaned at 3 weeks of age need to provide special nutrition, appropriate environmental control and good management to help the weaned pigs grow better.
For early weaned piglets, the remaining colostrum antibodies in the blood will provide some protection against some pathogens, but not all pathogens. It is also important that the antibodies provided by conventional breast milk to protect the intestines are completely and suddenly stopped at the time of weaning, so the stress on the piglets is particularly large and the risk of disease is greatly increased.
Before 6 weeks of age, the pig's own immune system continued to develop and its function was not mature. During this transition period, the body may take several days to recognize and respond to the antigen, but this is too late, and the weaned piglets are very susceptible to pathogen attack.
We can ensure the successful development of post-weaning piglets by providing various efforts to ensure that their fragile immune system avoids unnecessary challenges. The management aspects mainly include the following aspects:
1. The nursery should provide a special climate: the temperature of the nursery should be controlled at 24-28 degrees, and the humidity should be controlled at 60%-70%.
2, special nutrition and feeding procedures, including attention to the need for water: generally use a week of teaching material, and then transition to high-quality nursery, less feeding mode or free feeding, and improve clean enough Drinking water.
3, the nursery and the nursery should also be isolated from each other to reduce the risk of cross-infection of pigs of different ages.
4. Keep a certain distance from other pig houses to prevent air pollution from pigs or growing fattening pigs.
5, inoculation of common vaccines, such as: piglets, pseudo-rabies, rings and other vaccines, to ensure that pigs have sufficient antibody protection when transferred out of the nursery.
6. In the weaning stage, reliable antibiotic treatment is given to the frail and sick piglets, and then transferred to the nursery after rehabilitation.
7. Regularly use deworming drugs to deworm the weaned nurses to reduce the impact on the pigs caused by parasites.
The level of IgM antibody begins to rise after 1 week after the initial infection, while the IgG appears later than IgM (usually in 14 days after infection) and can last for 6 months or even several years, which meansthat the IgG serves as an indicator of previous infection. Suspected patients that are infected by 2019-nCoV can be rapidly identified by simultaneous monitoring of IgM and IgG. During the outbreak period of2003-SARS and the 2016-Zika, IgM / IgG antibody detection was used as one of the recommendeddiagnostic methods.
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