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Joseph J, Sankarshanan M, Kalyanikutty S. Repetitive extragenic palindromic and enterobacterial repetitive intergenic consensus sequence‐based typing of Shiga toxin‐producing
Escherichia coli
from bovine samples. J Food Saf 2022. [DOI: 10.1111/jfs.12977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jomy Joseph
- Department of Microbiology Sree Sankara College Kalady India
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Magossi G, Lambertini E, Noll L, Bai J, Jones C, Nagaraja TG, Phebus R, Woodworth J, Trinetta V. Potential risk-factors affecting Salmonella sp. and Escherichia coli occurrence and distribution in Midwestern United States swine feed mills. J Appl Microbiol 2020; 129:1744-1750. [PMID: 32648660 DOI: 10.1111/jam.14758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 11/29/2022]
Abstract
AIM This study aimed to evaluate the patterns and potential risk factors associated with the occurrence of Salmonella sp. and Escherichia coli in selected United States swine feed mills. METHODS AND RESULTS A total of 405 samples were collected during fall 2018, spring and summer 2019 from selected sites including floors, equipment, shoes and feed in six feed mills in the US Midwest region. Each sample was analysed for the presence of Salmonella and E. coli with culture methods and confirmed by PCR. A survey regarding production volumes, hygiene practices and microbial testing capabilities was conducted in each facility All mills had at least one sampling site positive for either Salmonella or E. coli. Of the 405 samples, 4·7, and 14·1% were positive for Salmonella sp., and E. coli respectively. Sites with higher percentages of positive samples were the receiving, manufacturing, and control area floors. The survey responses indicated that the age of the mill might be a risk factor for bacterial contamination: the older the facility, the higher the number of positive samples. Other risk factors evaluated, such as the production capacity, did not appear to relate to bacterial prevalence. CONCLUSION The data documents the presence of E. coli and Salmonella in selected US swine feed mills, and an association between E. coli occurrence and number of ingredient suppliers to feed mill. SIGNIFICANCE AND IMPACT OF THE STUDY This information could be used to understand risk factors affecting the occurrence of Salmonella sp. and E. coli in feed mills and help implement monitoring and mitigation strategies for public health.
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Affiliation(s)
- G Magossi
- Food Science Institute, Kansas State University, Manhattan, KS, USA
| | - E Lambertini
- Center for Health and Environmental Modeling, RTI International, Research Triangle Park, NC, USA
| | - L Noll
- Kansas State Veterinary Diagnostic Laboratory, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - J Bai
- Kansas State Veterinary Diagnostic Laboratory, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - C Jones
- Department of Animal Sciences and Industry, Kansas State University, North Manhattan, KS, USA
| | - T G Nagaraja
- Kansas State Veterinary Diagnostic Laboratory, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - R Phebus
- Food Science Institute, Kansas State University, Manhattan, KS, USA.,Department of Animal Sciences and Industry, Kansas State University, North Manhattan, KS, USA
| | - J Woodworth
- Department of Animal Sciences and Industry, Kansas State University, North Manhattan, KS, USA
| | - V Trinetta
- Food Science Institute, Kansas State University, Manhattan, KS, USA.,Department of Animal Sciences and Industry, Kansas State University, North Manhattan, KS, USA
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Chaney WE, Maloney R, Johnson BJ, Brooks JC, Brashears MM, Loneragan GH. Corn-Based Distillers' Grains in Diets for Feedlot Cattle Are Associated with the Burden of Escherichia coli O157 in Feces. Foodborne Pathog Dis 2018; 15:398-405. [PMID: 29620957 DOI: 10.1089/fpd.2017.2395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Inclusion of distillers' grains (DGs) has been associated with increased prevalence of Escherichia coli O157:H7 in cattle housed in research settings. Our objective was to quantify the relationship between inclusion of DGs in commercial feedlot rations and the burden of E. coli O157. A convenience sample of 10 feedlots was enrolled based on DG use in finishing diets; 1 cohort included 5 feedlots in which DGs were greater than 15% of the dietary dry matter and the other cohort consisted of 5 feedlots at a concentration less than 8%. Sampling occurred at each feedlot on four occasions at ∼6-week intervals. At each feedlot visit, 4 pens of cattle within 3 weeks of slaughter were selected and 24 freshly voided fecal pats were sampled. Ten-gram samples were enriched in 90 mL of modified tryptic soy broth with novobiocin (20 mg/L) for 14 h at 42°C. Enrichments were subjected to immunomagnetic separation, plating onto chromogenic agar with novobiocin (5 mg/L) and potassium tellurite (2.5 mg/L), incubation for 18 h at 37°C, and latex agglutination of morphologically typical colonies. E. coli O157 was recovered from 16.7% of 3840 samples. Adjusted prevalence was 14.3% after controlling for within-feedlot and within-pen clustering. Prevalence during each sampling period was 19.9% (round 1), 21.0% (round 2), 14.1% (round 3), and 11.7% (round 4). Prevalence varied between cohorts, but this difference varied over time (p = 0.06). Among those with greater than 15% of the diet as DGs, prevalence was greater than those with less than 8% inclusion for all rounds of sampling (p < 0.01). Averaged across time, prevalence was 23.9% and 9.4% for those with greater than 15% and those with less than 8% of DGs, respectively. While observational, these data provide real-world support of reports of increased E. coli O157:H7 burden associated with DG use in cattle diets.
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Affiliation(s)
- W Evan Chaney
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
| | - Rebecca Maloney
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
| | - Bradley J Johnson
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
| | - J Chance Brooks
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
| | - Mindy M Brashears
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
| | - Guy H Loneragan
- Department of Animal and Food Sciences, International Center for Food Industry Excellence, Texas Tech University , Lubbock, Texas
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