자료유형  

 학위논문

Control Number  

0016935149

International Standard Book Number  

9798380070454

Dewey Decimal Classification Number  

636

Main Entry-Personal Name  

Walker, Alicia.

Publication, Distribution, etc. (Imprint  

[S.l.] : Texas A&M University., 2022

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2022

Physical Description  

1 online resource(103 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-02, Section: B.

General Note  

Advisor: Carey, John B.;Norman, Keri.

Dissertation Note  

Thesis (Ph.D.)--Texas A&M University, 2022.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약Salmonella is a zoonotic bacteria threatening food safety, especially in the poultry industry. There are thousands of serovars, but S. Kentucky, S. Heidelberg, S. Enteritidis, and S. Typhumirum are the most commonly detected serovars in poultry. The poultry industry invests much time and money in preharvest and post-harvest interventions to reduce the prevalence of Salmonella. We assessed boot swab samples taken at the farm along with hot rehang, prechill, post chill, and chicken part samples collected at two geographically processing facilities to determine the effect of preharvest and post harvest interventions on Salmonella prevalence. Carcass rinse samples were taken using the rinsates Buffered Pepton Water (BPW) and Neutralizing Buffered Peptone Water nBPW to collect hot rehang, prechill, post chill, poultry parts, and boot swabs. The samples were analyzed for Salmonella presence or absence using Polymerase Chain Reaction (PCR). We found that Salmonella prevalence was significantly associated with the season and the location of the poultry processing facility. We also found that some hatchery vaccines were significantly associated with a reduction in Salmonella prevalence. When preharvest interventions were used individually, such as gentamicin, the prevalence of Salmonella was reduced. When used in conjunction with Megan Vac 1, there was no reduction or change in the prevalence of Salmonella. Using a treatment in the water (PWT®, Aquaprime®, litter (PLT®), and feed (OptiBac®) contributed to a reduction of Salmonella prevalence. Post harvest interventions like PAA aid with continuous reduction of prevalence, especially in post chill samples and finished products. We saw a significant reduction in Salmonella prevalence from hot rehang samples to post chill samples. Although the prevalence of Salmonella is high at hot rehang, this research provides evidence that investing in some preharvest interventions may provide a reduction in Salmonella.

Subject Added Entry-Topical Term  

Animal sciences.

Subject Added Entry-Topical Term  

Microbiology.

Index Term-Uncontrolled  

Salmonella kentucky

Index Term-Uncontrolled  

Salmonella heidelberg

Index Term-Uncontrolled  

Salmonella enteritidis

Index Term-Uncontrolled  

Typhumrium

Index Term-Uncontrolled  

Interventions

Index Term-Uncontrolled  

Preharvest

Index Term-Uncontrolled  

Post harvest

Added Entry-Corporate Name  

Texas A&M University Poultry Science

Host Item Entry  

Dissertations Abstracts International. 85-02B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:642697