Preventing Porcine Japanese Encephalitis in Early Summer

As early summer arrives, the weather gradually grows hotter, and various mosquitoes (such as Culex, Aedes, and Anopheles) begin to multiply in large numbers. Mosquitoes are an important vector for the transmission of Japanese encephalitis virus; after feeding on the blood of infected animals, they can carry the virus for life and can also carry the virus through the winter, becoming the source of infection the following year. Japanese encephalitis is highly harmful and can infect many kinds of animals and humans, with the most severe harm to pigs. In particular, it can damage the reproductive performance of pigs, causing pregnant sows to miscarry and produce stillborn, weak, or mummified fetuses, and causing orchitis in boars, while clinically there is a lack of effective therapeutic drugs. Therefore, raisers should begin preventive work against porcine Japanese encephalitis from early summer.

I. Vaccination: Use live porcine Japanese encephalitis vaccine. According to the doses indicated on the bottle label, add 1 milliliter of the special diluent to each dose. After it is completely dissolved, inject 1 milliliter intramuscularly into each pig. The immune protection period is 12 months. For replacement gilts and breeding boars in positive pig farms, a booster immunization can be given 20 to 30 days before mating.

II. Clear ditches: Organize the drainage channels inside and outside the @#@227@#@ farm as early as possible, and remove all kinds of weeds in the farm; after rain, dredge pipes and ditches promptly to prevent rainwater from accumulating in the farm. Pig farms in low-lying areas should pay even more attention to flood prevention.

III. Handle manure and urine: Promptly clean up the manure and sewage in the breeding farm. Manure should be piled up for fermentation, and manure ditches and septic tanks should be covered with cement covers. Small pig farms should transport manure outside the farm for fermentation treatment. Backyard raisers should also pay attention to promptly cleaning the pens and removing manure to prevent manure and urine from accumulating for too long.

IV. Hang gauze nets: After discovering mosquito activity, nail window screens in the pig pens and hang gauze nets or install gauze doors at the entrances, and promptly spray external insecticides such as "Wenyingjing." Before nailing the gauze nets, first apply mosquito- and fly-killing drugs in the pig house. Less noticeable small corners, wall cracks, ceiling gaps, and other places should all be sprayed thoroughly.

V. Do a good job of sanitation: Clean the breeding farm regularly, and disinfect 2 to 3 times a week. Snakes, frogs, and toads can also carry the virus. In places where these small animals are relatively active, even more attention should be paid to sanitation to prevent small animals from entering the farm area.