Causes of failure of Pig Immunization
(1) the immunization procedure is unreasonable. Scientific immune procedure will produce good immunity, if the immune procedure is unreasonable, its immunity will be reduced accordingly. According to the routine surprise immune injection in spring and autumn, because of the leakage of prevention and injection, those who should be vaccinated can not be immunized, resulting in the disease of some pigs.
(2) the epidemic prevention system is not strict. Some epidemic prevention workers and / or 227 people do not carry out immunization because they are afraid that the piglets will die after being vaccinated. As a result, the epidemic prevention density of pigs decreases, and pigs also get sick.
(3) lack of correct feeding and management. Live pigs are physically weak, malnourished or suffer from chronic diseases, resulting in a weakening of the immune response. Although pigs are vaccinated, they do not produce effective immunity.
(4) latent infectious diseases of pigs, such as Ascaris lumbricoides, pulmonary filariasis and other diseases, will have a more serious reaction and even cause death after vaccination.
(5) excessive dilution or insufficient dose of vaccine, so that pigs can not produce strong immunity.
(6) single combined seedlings should be selected, but not double or triple seedlings. In our survey of farms and farmers with swine disease, most of them use triple vaccine, because the dosage of combined vaccine is inconsistent, which affects the production of immunity more or less, and the effect is not good.
(7) the disinfectant solution is too strong and penetrates into the pinhole or injection needle so that the vaccine is ineffective or ineffective.
(8) the alkalinity of the diluent is too strong, more than pH 7.0, resulting in inefficacy or inefficacy of the vaccine.
(9) the temperature of all kinds of vaccines that should be preserved at low temperature should not be higher than 10 ℃. When there is no cold storage equipment, can be used with ice insulation jar or incubator, but the vaccine must be used up for 10 days from the date of transportation.
(10) the diluted vaccine was not used up within 4 hours and continued to be used.
- Prev
Beware of swine dysentery poisoning
Dysentery is a yellow powder, slightly soluble in water, not easy to be absorbed after oral administration, high concentration in the intestinal tract, but low toxicity. It is effective against Clostridium, Salmonella, Staphylococci, Streptococcus and Escherichia coli. The general dosage of pigs should be 0.007 grams per kilogram of body weight, which should be taken orally for 3 times. The sensitivity of adult pigs to dysentery was poor, while that of piglets was high. When excessive feeding or long-term use, it can cause acute or chronic poisoning. After poisoning, the piglets lost their appetite and their limbs were weak.
- Next
Management of parturient sows
1. The expected delivery time of prenatal preparation sows is generally about 110-120 days. At this stage, we should strengthen the observation of the situation of sows and make the following preparations for delivery. First of all, choose the place suitable for sow delivery, and then do a good job in the cleaning and disinfection of the delivery house one week before the sow enters the house, with a soft mat of grass, and check the warm facilities of the pig house when giving birth in winter and spring. Summer and autumn should check the heat prevention and ventilation conditions in the house. Clean the pig body a few days before delivery and disinfect it. Use 0.1
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