Longitudinal Assessment of Prevalence and Incidence of Salmonella and Escherichia coli O157 Resistance to Antimicrobials in Feedlot Cattle Sourced and Finished in Two Different Regions of the United States

被引：2
|
作者：
Dornbach, Colten W. [1 ]
Hales, Kristin E. [1 ]
Gubbels, Erin R. [2 ]
Wells, James E. [3 ]
Hoffman, Ashley A. [1 ]
Hanratty, Ashlee N. [1 ]
Line, Dalton J. [1 ]
Smock, Taylor M. [1 ]
Manahan, Jeff L. [1 ]
McDaniel, Zach S. [1 ]
Kohl, Kesley B. [1 ]
Sanchez, Nicole Burdick C. [4 ]
Carroll, Jeffery A. [4 ]
Rusche, Warren C. [2 ]
Smith, Zachary K. [2 ]
Broadway, Paul R. [4 ,5 ]
机构：
[1] Texas Tech Univ, Dept Anim & Food Sci, Lubbock, TX USA
[2] South Dakota State Univ, Dept Anim Sci, Brookings, SD USA
[3] USDA ARS, US Meat Anim Res Ctr, Clay Ctr, NE USA
[4] USDA ARS, Livestock Issues Res Unit, Lubbock, TX USA
[5] USDA ARS, Livestock Issues Res Unit, 1604 East FM 1294, Lubbock, TX 79403 USA
来源：
FOODBORNE PATHOGENS AND DISEASE | 2023年 / 20卷 / 08期
关键词：
beef; feedlot; Salmonella; Escherichia coli; antimicrobial resistance; region; LYMPH-NODES; BEEF-CATTLE; SEASONAL PREVALENCE; DAIRY FARMS; HIDES; FECES; ENTERICA; CULL; INTERVENTIONS; CONTAMINATION;
D O I：
10.1089/fpd.2023.0009
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
The objective was to investigate the influence of cattle origin and region of finishing on the prevalence of Salmonella, Escherichia coli O157:H7, and select antimicrobial resistance in E. coli populations. Yearling heifers (n = 190) were utilized in a 2 x 2 factorial arrangement. After determining fecal Salmonella prevalence, heifers were sorted into one of four treatments: heifers originating from South Dakota (SD) and finished in SD (SD-SD); heifers originating from SD and finished in Texas (SD-TX); heifers originating from TX and finished in SD (TX-SD); and heifers originating from TX and finished in TX (TX-TX). Fecal, pen, and water scum line samples were collected longitudinally throughout the study; hide swab and subiliac lymph node (SLN) samples were collected at study end. A treatment x time interaction was observed (p & LE; 0.01) for fecal Salmonella prevalence, with prevalence being greatest for TX-TX and TX-SD heifers before transport. From day (d) 14 through study end, prevalence was greatest for TX-TX and SD-TX heifers compared with SD-SD and TX-SD heifers. Salmonella prevalence on hides were greater (p & LE; 0.01) for heifers finished in TX compared with SD. Salmonella prevalence in SLN tended (p = 0.06) to be greater in TX-TX and SD-TX heifers compared with TX-SD and SD-SD. Fecal E. coli O157:H7 prevalence had a treatment x time interaction (p = 0.04), with SD-TX prevalence being greater than TX-SD on d 56 and SD-SD and TX-TX being intermediate. A treatment x time interaction was observed for fecal trimethoprim-sulfamethoxazole-resistant and cefotaxime-resistant E. coli O157:H7 prevalence (p & LE; 0.01). Overall, these data suggest that the region of finishing influences pathogenic bacterial shedding patterns, with the initial 14 d after feedlot arrival being critical for pathogen carriage.
引用
收藏
页码：334 / 342
页数：9
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