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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