African swine fever prevention and control measures for companies and farmers' farms

African swine fever prevention and control measures for companies and farmers' farms

公司As a business model for pig farming production in China, the combination of companies and farmers has achieved tremendous development and success over the past few decades due to its suitability for China's national conditions. After the outbreak of African swine fever in China in August 2018, farmers have a natural advantage in preventing and controlling African swine fever. However, due to some shortcomings in its historical development, preventing and controlling African swine fever also faces huge challenges. This article provides a brief analysis of the specific measures that farmers should take to prevent and control African swine fever in their farms.

1、 The site of the farmer's farm

Due to the fact that the majority of farmers are local residents and the scale of pig farms is not large, they have a natural advantage in selecting pig farm locations. The author has visited rural farms and found that many of them are more than 500 meters away from villages, transportation arteries, etc. for epidemic prevention or have mountain and water barriers. The site selection is very good, which provides good innate conditions for the prevention and control of African swine fever. But there are also some farmers whose farms are located near the village or the farms of multiple companies. If the surrounding environment is not very good, it is recommended to suspend the release of seedlings or even terminate the agreement between the company and the farmers.

2、 Moderate hardware upgrade and renovation

1. Wall and gate

The main function of a fence is to block the entry of non staff members and dogs, and it cannot block cats, birds, mosquitoes, and flies, so it is not necessary to use a physical fence. Due to historical reasons, a large part of the farmers' farms that the author has visited do not have walls or gates. Under non epidemic conditions, reinforced steel fences and lockable gates are one of the hardware renovation measures for preventing and controlling African swine fever.

2. Bird proof net

Birds can mechanically transmit African swine fever virus. Installing bird nets in an open pigsty can not only prevent birds, but also block cats from entering.

3、 Pig flow

Almost all companies adopt a full in and full out production model for their farmers' farms, which is a huge advantage in controlling diseases. But the author also found that some companies adopt the method of purchasing piglets for stocking. Past experience has found that some purchased pig seedlings carry viruses, but they do not develop symptoms, and even test negative for non plague. After transportation and environmental stress changes, they develop symptoms on farmers' farms, and even on medium pigs. This reminds companies that purchase pig seedlings to be cautious when choosing sow farms with purchased seedlings.

4、 Feed

Feed can spread African swine fever, but past experience has shown that feed as a vector for the transmission of African swine fever virus is a low-risk factor, while feed transportation is a high-risk factor for the transmission of African swine fever.

1. Management of transportation vehicles and drivers.

Most of the company and farmer pig farms are equipped with specialized transportation vehicles and drivers by the company to deliver feed according to the needs of farmers. Relatively speaking, transporting bulk materials with tanker trucks is safer than transporting packaged materials with packaging trucks. The most ideal solution is to clean, disinfect, and dry the transport vehicles after delivering the feed to one farmer's farm, and then deliver it to the next farmer. Taking a shower and changing work clothes before starting work is also an ideal choice for drivers.

2. Feed delivery frequency

The frequency of feed delivery should be as low as possible, and it should never be delivered every day. The scale of the farmers' farms is not large, so delivering once every two weeks or once a week is a better choice.

3. Transport vehicles can only park at the edge of the fence and are absolutely not allowed to enter. The existing rooms on the edge of the fence in the farmer's farm can be used as feed transfer rooms after cleaning and disinfection. Install ultraviolet lamps in the room.

5、 Water

I have found that many farmers have been using groundwater on their farms, which is a good practice. If there is no groundwater, surface water must undergo sedimentation, filtration, and disinfection before it can be used.

6、 Personnel entry and exit

1. The most basic requirement is to prevent non pig farm staff, including farmers' families, children, and relatives, from entering the site.

2. The biggest risk factor for preventing and controlling African swine fever in farmers' farms is that pig farmers go home every day. This requires the company to have adequate publicity, training, supervision, and reward measures in place. The ideal situation is for farmers and pig farmers to raise a batch of pigs and then go out after they are slaughtered, but this is not realistic. You can go out once or twice a month and require strict bathing, changing clothes and shoes after returning to the venue. Conditional companies can install remote monitoring.

7、 Material entry

Materials needed by farmers for pig production, such as carts, shovel, brooms, etc., can be sprayed and disinfected with Dahuannong Chlorine Sanitizer, and can enter the site after a period of standing. Remove the outer packaging of drugs and vaccines at the entrance of the venue, wipe and disinfect with chlorhexidine before entering.

8、 Mosquito and rodent control

The company will regularly distribute mosquito and rodent killing drugs to farmers, and supervise their standardized use and strict implementation. The chickens raised by farmers on the pig farm need to be moved away. The dogs raised by farmers on the pig farm must either be moved or tied up and cannot wander around.

9、 Disinfection

Require farmers to disinfect the inside and outside of the pigsty with Dahua Nong Chlorhexidine at least twice a week.

10、 Drug Health Care

Mix 3 kilograms of Dahua Nong Hot Poison Clear, 3 kilograms of Jia Miankang, and 1 kilogram of Timikang per ton of feed every month for 7-10 days for health care. This prescription combines Chinese and Western medicine, and has a good preventive and therapeutic effect on all febrile viral diseases, including blue ear disease. It also has an auxiliary preventive effect on African swine fever, and can enhance non-specific immunity in pigs by adding Miankang and preventing secondary bacterial infections by using TiMeikang.

11、 African swine fever surveillance

The existing companies that adopt a company farmer model for pig farming are equipped with testing laboratories in different areas. It is a standard practice for each company to conduct timely non plague testing on abnormal pigs on the farm.

12、 Selling pigs

公司Under the company+farmer model, it is a reasonable choice for the company to build a centralized pig transfer platform and a pig transport vehicle cleaning and disinfection station in a free range area. The pigs in the farmer's farm are transported by dedicated pig transfer vehicles provided by the company to the pig transfer platform for sale.

Wen/Fang Lijin