Since the winter of 2011, pig diarrhea has returned again, with a mortality rate between 50% and 100%, which has continued to this day. Pig diarrhea is also a big problem. Below, Xiao Lin editors share some tips on prevention and control of epidemic diarrhea in pigs and pigs, hoping to help everyone.
1, empty house disinfection method
Top left: wet water
Right: foam spray
Bottom: rinse with water
2, the key point of return feeding details
a, the choice of disease materials - to have enough virus content
Receive virus: 36-48 hours
b, the production of disease materials - there must be enough live virus
After the gut tube of the qualified disease material is mashed by the tissue homogenizer, 300 ml of cold or frozen fresh milk is added per 100 g of intestinal tube, and amoxicillin is 3 g.
c. Monitoring of the feeding process – ensure that each returning object has enough live virus
Feed all the on-the-spot, pregnancy (adjusted into the delivery room 7 days before delivery, the sows in the delivery room should not return to feed), each leg is 2-3g. The presence of diarrhea in the sow indicates that the infection was successful, and the diarrhea was repeated once after four days. After the second infection, the diarrhea of ​​the sow was no longer fed. The sows that have not returned to the delivery house are fed once in a row after weaning.
Tracking after returning
3. Reserve pig domestication
a. The cultivation and domestication of the reserve pigs are not taken seriously, and the reserve pigs are the source of pig disease control;
b. PED breeding procedures for reserve pigs
Active infection or live vaccine (PED) of reserve pigs;
1 ml (viral content 10 5.5, 10 6.5 & 10 7.5) was fed to 3-week-old piglets. If diarrhea did not occur at 10 5.5 titers, the disease was discarded.
4, live vaccine screening
RT-PCR results to determine the virus titer calculation method: lgRT-PCR50 = the logarithm of the lowest dilution - the difference between the logarithm of the dilution × (the sum of the positive sample ratio - 0.5) = the lowest dilution logarithm - 1 × (positive The sum of the ratios -0.5).
Extension: Some insights about epidemic diarrhea
1. Production layout and bio-safety: multi-point, sub-time, on-site and off-site;
2. Breeding groups, especially reserve pigs: at least one effective exposure to a live poison (a disease or live vaccine);
3, increase the maternal antibody titer before delivery: effective return or reliable live vaccine or reliable inactivated vaccine;
4. Reasonable production arrangements: leave enough time for empty space;
5. Reasonable arrangement of production process: effective empty column disinfection and drying; production operation after colostrum.
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