Stringfellow K, Caldwell D, Lee J, Byrd A, Carey J, Kessler K, McReynolds J, Bell A, Stipanovic R, Farnell M
Department of Poultry Science, Texas AgriLife Research and Extension Service, Texas A&M System, College Station 77843.
USDA, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX 77845.
J Appl Poult Res. 2010 Dec 1;19(4):380-386. doi: 10.3382/japr.2009-00097. Epub 2019 Dec 11.
The nursery industry pasteurizes soil with steam and quicklime to reduce plant pathogens. The mechanism of action for quicklime is the resulting exothermic reaction that occurs when the chemical interacts with water and its ability to increase pH levels. These treatments may also reduce pathogens in a commercial poultry house. In this study, a steam sterilization cart simulated conditions used by the nursery industry to treat litter inoculated with serovar Typhimurium. A homogenized sample of litter was exposed to steam for 0, 5, 30, or 120 min. Quicklime was used at concentrations of 0 (control), 2.5, 5.0, or 10.0%. All steam treatments, with or without quicklime, significantly reduced Typhimurium colonization by at least 3 orders of magnitude. Significant reductions were also observed in the treatments with quicklime alone. Both the steam and the quicklime treatments often reduced colonization to undetectable levels, even when samples were enriched. Therefore, we demonstrated 2 novel techniques for reducing Typhimurium in poultry litter. Soil pasteurization potentially offers an environmentally sound means of reducing the pathogens present in used poultry litter.
苗圃行业用蒸汽和生石灰对土壤进行巴氏消毒，以减少植物病原体。生石灰的作用机制是其与水相互作用时产生的放热反应以及提高pH值的能力。这些处理方法也可能减少商业家禽舍中的病原体。在本研究中，一个蒸汽消毒推车模拟了苗圃行业用于处理接种鼠伤寒血清型的垫料的条件。将垫料的匀浆样本暴露于蒸汽中0、5、30或120分钟。使用浓度为0（对照）、2.5%、5.0%或10.0%的生石灰。所有蒸汽处理，无论有无生石灰，均显著降低了鼠伤寒菌的定植，至少降低了3个数量级。在仅使用生石灰的处理中也观察到了显著的减少。蒸汽和生石灰处理通常都将定植减少到无法检测的水平，即使样本经过富集处理也是如此。因此，我们展示了两种减少家禽垫料中鼠伤寒菌的新技术。土壤巴氏消毒可能提供一种环境友好的方法来减少用过的家禽垫料中的病原体。
