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Prevalence and Antimicrobial Resistance of Salmonella and Campylobacter in a Poultry Facility that Processes Antibiotic-free Broilers Using Organic and Conventional Methods- [electronic resource]
Prevalence and Antimicrobial Resistance of Salmonella and Campylobacter in a Poultry Facility that Processes Antibiotic-free Broilers Using Organic and Conventional Methods- [electronic resource]
상세정보
- 자료유형
- 학위논문(국외)
- 자관 청구기호
- 기본표목-개인명
- 표제와 책임표시사항
- Prevalence and Antimicrobial Resistance of Salmonella and Campylobacter in a Poultry Facility that Processes Antibiotic-free Broilers Using Organic and Conventional Methods - [electronic resource] / Bailey, Matthew.
- 발행, 배포, 간사 사항
- 발행, 배포, 간사 사항
- 형태사항
- 1 online resource(138 p)
- 일반주기
- Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
- 일반주기
- Advisers: Haley F. Oliver; Manpreet Singh.
- 학위논문주기
- Thesis (Ph.D.)--Purdue University, 2017.
- 요약 등 주기
- 요약Salmonella and Campylobacter are important pathogens in terms of food safety, and are leading causes of foodborne illness worldwide. Management practices aimed at controlling these pathogens during production and processing of poultry are important for safeguarding public health. The use of organic and antibiotic-free practices has become more frequent in the production of chicken, however the impact of these methods on Salmonella and Campylobacter in terms of prevalence and antimicrobial resistance is still uncertain. It may be the case that outdoor-access requirements for organic birds increases the likelihood of a flock becoming contaminated by outside sources such as wild animals and birds. In addition, removal of selective pressure by eliminating antibiotic use on the farm is thought to be an effective measure against rising prevalence of AMR pathogens. In this experiment, these hypotheses were tested by sampling a processing plant that produces "antibiotic-free" chicken using organic and conventional processing methods. Samples were collected on 16 days (8 each for organic and conventional birds) over a 1-year period. Samples included fecal samples from incoming birds, carcass rinses at important processing steps, and environmental samples. Differences in prevalence of Salmonella and Campylobacter between methods (organic and conventional) were assessed and isolates collected in this study were tested for AMR using methods published by NARMS. Organic methods were associated with higher prevalence of Salmonella but lower prevalence of Campylobacter during early processing steps. No major differences in prevalence between methods were observed post-chill. Prevalence of AMR Salmonella was lower in these antibiotic-free birds than was reported by NARMS in chickens at slaughter. However, AMR prevalence was higher in Campylobacter than was observed by NARMS. These results indicate that organic methods may result in increased initial prevalence of Salmonella, but decreased initial prevalence of Campylobacter, although higher prevalence associated with either organic or conventional methods is managed by proper processing interventions. Additionally, although these results support the hypothesis that elimination of antibiotics reduces the prevalence of AMR Salmonella, this does not appear to be true for Campylobacter for most antimicrobials tested.
- 주제명부출표목-일반주제명
- 부출표목-단체명
- 기본자료저록
- Dissertation Abstracts International. 78-12B(E).
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 원문정보보기
- 소장사항
-
20180515 2018
MARC
008180601s2017 us esm 001c eng■001MOKWON01258765
■00520180518093835
■007cr
■020 ▼a9780355089684
■035 ▼a(MiAaPQ)AAI10272793
■035 ▼a(MiAaPQ)purdue:21353
■040 ▼aMiAaPQ▼cMiAaPQ
■090 ▼a전자도서(박사논문)
■1001 ▼aBailey, Matthew.
■24510▼aPrevalence and Antimicrobial Resistance of Salmonella and Campylobacter in a Poultry Facility that Processes Antibiotic-free Broilers Using Organic and Conventional Methods▼h[electronic resource]▼cBailey, Matthew.
■260 ▼a[Sl]▼bPurdue University▼c2017
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2017
■300 ▼a1 online resource(138 p)
■500 ▼aSource: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
■500 ▼aAdvisers: Haley F. Oliver; Manpreet Singh.
■5021 ▼aThesis (Ph.D.)--Purdue University, 2017.
■520 ▼aSalmonella and Campylobacter are important pathogens in terms of food safety, and are leading causes of foodborne illness worldwide. Management practices aimed at controlling these pathogens during production and processing of poultry are important for safeguarding public health. The use of organic and antibiotic-free practices has become more frequent in the production of chicken, however the impact of these methods on Salmonella and Campylobacter in terms of prevalence and antimicrobial resistance is still uncertain. It may be the case that outdoor-access requirements for organic birds increases the likelihood of a flock becoming contaminated by outside sources such as wild animals and birds. In addition, removal of selective pressure by eliminating antibiotic use on the farm is thought to be an effective measure against rising prevalence of AMR pathogens. In this experiment, these hypotheses were tested by sampling a processing plant that produces "antibiotic-free" chicken using organic and conventional processing methods. Samples were collected on 16 days (8 each for organic and conventional birds) over a 1-year period. Samples included fecal samples from incoming birds, carcass rinses at important processing steps, and environmental samples. Differences in prevalence of Salmonella and Campylobacter between methods (organic and conventional) were assessed and isolates collected in this study were tested for AMR using methods published by NARMS. Organic methods were associated with higher prevalence of Salmonella but lower prevalence of Campylobacter during early processing steps. No major differences in prevalence between methods were observed post-chill. Prevalence of AMR Salmonella was lower in these antibiotic-free birds than was reported by NARMS in chickens at slaughter. However, AMR prevalence was higher in Campylobacter than was observed by NARMS. These results indicate that organic methods may result in increased initial prevalence of Salmonella, but decreased initial prevalence of Campylobacter, although higher prevalence associated with either organic or conventional methods is managed by proper processing interventions. Additionally, although these results support the hypothesis that elimination of antibiotics reduces the prevalence of AMR Salmonella, this does not appear to be true for Campylobacter for most antimicrobials tested.
■590 ▼aSchool code: 0183.
■650 4▼aFood science
■690 ▼a0359
■71020▼aPurdue University▼bFood Science.
■7730 ▼tDissertation Abstracts International▼g78-12B(E).
■773 ▼tDissertation Abstract International
■790 ▼a0183
■791 ▼aPh.D.
■792 ▼a2017
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14822989▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a20180515▼f2018
