Prevention and control methods for pathogenic porcine reproductive and respiratory syndrome in pigs during the high-temperature, high-humidity period of midsummer

    The high-temperature, high-humidity environment of midsummer can easily trigger highly pathogenic porcine reproductive and respiratory syndrome. The guiding principles for controlling and eradicating newly emerging highly pathogenic porcine reproductive and respiratory syndrome are: early detection, early reporting, early isolation, early monitoring, early disinfection, early eradication, and early immunization. For this disease, comprehensive prevention and control measures and symptomatic treatment are mainly adopted.

Pigs

    First, immunization.Use an inactivated vaccine for intramuscular injection at the root behind the ear. For piglets after weaning (or piglets over 3 weeks of age), give the first vaccination at 2 ml per pig; according to the local epidemic situation of pig diseases, a booster immunization may be given 28 days after the first vaccination. For sows and replacement gilts, vaccinate before 70 days of age, with the same vaccination schedule as commercial piglets, and thereafter give a booster immunization before each mating, or vaccinate once every 6 months at 4 ml per pig each time. For breeding boars, vaccinate before 70 days of age, with the same schedule as commercial piglets, and vaccinate once every 6 months at 4 ml per pig each time. In actual practice, immunization should be carried out according to the provisions in the vaccine instructions.

    Second, strict disinfection.This virus has poor survival ability in the external environment, and with proper disinfection measures it is easily killed. Aldehydes, chlorine-containing disinfectants, phenols, oxidants, alkalis, and others can be used to thoroughly disinfect pig houses, pig pens, feed troughs, equipment, and so on at least 2 to 3 times per week, so as to kill the pathogen and cut off the route of transmission.

    Third, scientific management.Maintain hygiene and cleanliness and fresh air; the stocking density of pigs should not be too high, with the principle of avoiding crowding; provide pigs with nutritionally complete feed to enhance their physical condition and ability to resist disease.

    Fourth, strictly control the channels for purchasing pigs.It is strictly forbidden to buy pigs from epidemic areas; do not buy transported pigs of unknown background or unclear origin; when buying pigs from the market, be sure to observe that they are healthy and disease-free, and only buy pigs that have been immunized and quarantined.