Opara O O, Carr L E, Russek-Cohen E, Tate C R, Mallinson E T, Miller R G, Stewart L E, Johnston R W, Joseph S W
Department of Microbiology, University of Maryland, College Park 20742.
Avian Dis. 1992 Jul-Sep;36(3):664-71.
Three flocks on 13 different broiler farms were monitored for Salmonella over three consecutive growout periods using the drag swab (DS) technique. One house was consistently negative for Salmonella contamination (7.7%); four houses were consistently positive (30.8%); and eight houses (61.5%) alternated between either a DS Salmonella-negative or -positive status. Simultaneously, numerous environmental parameters of the litter surface were measured, including water activity (Aw), ammonia, temperature, pH, moisture content (MC), ash content, and volatile solids. Analysis of these data as a corollary to either Salmonella-negative or -positive DS results revealed significant correlation coefficients for some of the parameters, especially Aw. The results suggest that there should be further exploration of remedial intervention based on control of some of the physical features of litter (e.g., controlling litter Aw and possibly MC and pH levels) in poultry houses.
在三个连续的肉鸡饲养期内，使用拖拭（DS）技术对13个不同肉鸡场的三个鸡群进行沙门氏菌监测。一个鸡舍沙门氏菌污染始终呈阴性（7.7%）；四个鸡舍始终呈阳性（30.8%）；八个鸡舍（61.5%）在DS沙门氏菌阴性或阳性状态之间交替。同时，测量了垫料表面的众多环境参数，包括水分活度（Aw）、氨、温度、pH值、水分含量（MC）、灰分含量和挥发性固体。将这些数据作为DS沙门氏菌阴性或阳性结果的推论进行分析，结果显示某些参数存在显著的相关系数，尤其是Aw。结果表明，应进一步探索基于控制家禽舍垫料某些物理特征（例如，控制垫料Aw以及可能的MC和pH值水平）的补救干预措施。
