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Guehwan Jang,Duri Lee,Sangjune Shin,Jeonggyo Lim,Hokeun Won,Youngjoon Eo,Cheol-Ho Kim,Changhee Lee 대한수의학회 2023 Journal of Veterinary Science Vol.24 No.4
Porcine epidemic diarrhea virus (PEDV) has posed significant financial threats to the domestic pig industry over the last three decades in South Korea. PEDV infection will mostly result in endemic persistence in the affected farrow-to-finish (FTF) herds, leading to endemic porcine epidemic diarrhea (PED) followed by year-round recurrent outbreaks. This review aims to encourage collaboration among swine producers, veterinarians, and researchers to offer answers that strengthen our understanding of PEDV in efforts to prevent and control endemic PED and to prepare for the next epidemics or pandemics. We found that collaboratively implementing a PED risk assessment and customized four-pillar-based control measures is vital to interrupt the chain of endemic PED in affected herds: the former can identify on-farm risk factors while the latter aims to compensate for or improve weaknesses via herd immunity stabilization and virus elimination. Under endemic PED, long-term virus survival in slurry and asymptomatically infected gilts (“Trojan Pigs”) that can transmit the virus to farrowing houses are key challenges for PEDV eradication in FTF farms and highlight the necessity for active monitoring and surveillance of the virus in herds and their environments. This paper underlines the current knowledge of molecular epidemiology and commercially available vaccines, as well as the risk assessment and customized strategies to control PEDV. The intervention measures for stabilizing herd immunity and eliminating virus circulation may be the cornerstone of establishing regional or national PED eradication programs.
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김동인,김순일,정제원,Rustem A. Ilyasov,Duri Jang,이성화,권형욱 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2
Porous cellulose beads (Viscopearl) manufactured from wood pulp can provide gradual-release action for aromatic substances. Here we immersed lemongrass oil, xanthoxylum oil, and vanillin to apply mosquito repellents. The volatiles from this Viscopearl were analyzed to obtain information for quality control (QC) or specification using a GC–MS, and its standard compounds were determined as linalool, geranial, neral, and vanillin. In a test using a 20 L chamber, it was confirmed that their constant amounts were released continuously and they did not be affected by light. In another monitoring test for 47 days on the Viscopearl equipped with a commercialized air conditioner operated for 8 h every day under indoor conditions, the amounts of all released components increased in proportion to the open number of the pores on the module, which is a housing case containing the Viscopearl. In addition, the concentration of 8 major components including 3 standard QC compounds (linalool, geranial, and neral) in a repellency test room depended on both the ventilation and elapsed time. The vapor from the module did not affect main 7 plastic units of the air conditioner, whereas the Viscopearl equipped with an air conditioner showed good mosquito repellency under test chamber and room conditions that temperature, relative humidity, and carbon dioxide concentration were controlled at 24.8–25.4 °C, 63.8–65.7%, and 708–1383 ppm, respectively. Therefore, the plant essential oil-based repellent Viscopearl has high potential to be used as human protective agent against indoor mosquitoes by applying it to air conditioners.
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