Swine pseudorabies is a viral infectious disease prevalent in the pig breeding industry, and the harm caused by this infectious disease is extremely serious.
The disease is often explosive in the pig population, causing pregnant sows to miscarry, stillbirth, boar infertility, newborn piglets caused neurological symptoms, dyskinesia, paralysis, exhaustion death, case fatality rate of 100%, fattening pigs have breathing difficulties, growth stagnation.
Since there is no particularly effective treatment for the disease, prevention is still the focus on production. Today, the Animal Husbandry Hall will talk to you about the causes and preventive measures of swine pseudorabies:
Causes of pseudorabies in pigs:
First, let's look at the source of pseudorabies:
Pigs are the host of pseudorabies virus, sick pigs and poisonous pigs are the main source of infection, and poisonous cats, rats, dogs, etc. can also transmit pseudorabies.
The virus is excreted from the body with the secretions of sick pigs such as nasal fluid, saliva, milk, urine, feces, etc., polluting the environment around feed, drinking water, bedding, feeding utensils and pigsty, and the air can cause the virus to spread.
Transmission of swine pseudorabies: Swine pseudorabies is a highly exposed infectious disease that can be transmitted through direct or indirect contact.
Infection mainly through the respiratory tract, digestive tract, damaged skin infection of pigs pseudorabies, such as eating and drinking feed and water contaminated by the virus, eating the milk of sick pigs and infection, contact with workers or utensils contaminated by the virus and infection, in addition to pregnant sows infecting fetuses through placenta, breeding through semen infection of healthy pigs.
Causes of pseudorabies:
Swine pseudorabies can occur throughout the year, but it occurs more during the peak period of sow littering and the cold season, so it is necessary to protect it.
1. Introduce diseased gilts. Pig farms usually buy back gilts from outside in order to continue to develop production, which increases the risk of infection with swine pseudorabies, resulting in sporadic or epidemic of the disease.
2. The long-term poisoning of breeding pigs increases the probability of infection of piglets. First, because rural free-range farmers do not raise boars themselves, the boars provided with semen are poisonous pigs, and they can be infected by contacting contaminated vaginal membranes or semen when breeding. Second, the poisonous pregnant sows of the pig farm can infect the fetus through the placenta, and the poisonous lactating sows can infect the piglets through milk.
3, do not pay attention to immunity. Today's rural free-range farmers and pig farms only pay attention to blue ear disease, foot-and-mouth disease, ring disease, epidemic diarrhea, etc., and ignore the prevention and control of pseudorabies.
4. There are many susceptible animals, and prevention and control are difficult. Pigs are the reservoir reservoir of pseudorabies viruses, but pseudorabies viruses can also infect dogs, cats, cattle and mice. If there are dogs, cats, mice, etc. in the pig farm, it will increase the probability of transmission and make it more difficult to prevent and control.
Precautions:
1. Vaccination
Vaccination is still the most important way to prevent pseudorabies in pigs, and it is also the most effective means. In epidemic prevention work, it is necessary to strictly follow the immunization procedures to vaccinate and try our best to improve the immunization effect.
2. Strengthen breeding management
Strengthen feeding management: First, control the feeding density, avoid overcrowding in the pig house, and ensure that the temperature and ventilation in the pig house are appropriate. Second, the pig house should be strictly disinfected. Floors, walls, facilities and utensils are disinfected regularly once a week to clean up feces in a timely manner. In the event of an outbreak, disinfection is required once every 2 to 3 days, and caustic soda or lime water can be used for disinfection. The third is to eliminate various sources of infection and vectors, especially to do a good job in exterminating rats, because rats are an important way for the spread of pseudorabies in pig farms.
3. Cultivate healthy pigs
The herd is subjected to multiple serological tests and the pseudorabies virus-positive pigs are phased out until the entire herd is negative. For newly introduced breeding pigs, it is necessary to isolate for a period of time and check the serum to confirm that it is not poisonous before it can be used for breeding.