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Quadruple protection procedure for resuming pig production in farms with African Swine Fever in Asia

Highlights #AfricanSwineFever outbreak has caused serious economic losses in China. #Pork supply in consequence faces huge demand.

• The small-scale farms in China are encountering difficulties in raising pigs.

• A comprehensive procedure was tested in 35 small pig farms that had been confirmed with African swine fever virus.

• During a one-year study, 100 percent of porkers and 98.8 percent of sows were healthy respectively.

• An effective biosafety procedure was developed for production of pigs in small-scale farms in China.

Abstract African swine fever (ASF) outbreak has caused serious economic losses in Asia since 2018. As ASF is a new emerging disease, many farmers hesitate to raise pigs before biosafety procedures were evaluated to be effective. To support small-scale farms in resuming pig production, a comprehensive procedure, called the quadruple protection procedure (QPP), was tested in 35 small farms which had been confirmed with African swine fever virus (ASFV). The QPP takes care of the farms' construction, environmental disinfection, regular immunization, and feed quality. Qualified daily management was supplemented as well. During a one-year survey four disinfectants and one piece of equipment were used in higher frequency. A 7- or 15-day empty period after the disinfection was suitable when it was combined with the rest of the protection measures from QPP. Totally 18,730 porkers and 3,006 sows were healthy by the end of the study with percentage of 100 and 98.8, respectively, indicating that QPP could protect pigs in small-scale farms from pathogens within China. This study developed an effective protective procedure system for small-scale farms to produce pigs under the risk of ASF outbreak.

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