共 30 条
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
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.
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页码:334 / 342
页数:9
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