東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back to Search results for [ null ]

Switch To: Labeled | MARC Mode | ISBD

Linked to FindBook

Google Book

Amazon

博客來

A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine./
Author:	Trudeau, Michaela P.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	187 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-08, Section: B.
Contained By:	Dissertations Abstracts International83-08B.
Subject:	Animal sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28868587
ISBN:	9798790626661

A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine.
Trudeau, Michaela P.

A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 187 p.

Source: Dissertations Abstracts International, Volume: 83-08, Section: B.

Thesis (Ph.D.)--University of Minnesota, 2021.

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

The mechanisms of action for antibiotic growth promotion are poorly understood, making it difficult to select effective alternatives capable of providing similar responses. The objective of this thesis was to identify mechanism of action when feeding growth promoting levels of antibiotics and antibiotic alternatives. The first trial identified tylosin-responsive metabolites in growing pigs. This experiment identified that feeding tylosin increased the concentration of the secondary bile acids hyodeoxycholic acid and lithocholic acid and multiple bacteria in the Clostridia family. These findings suggest the mechanism of growth promotion involves an alteration in bile acid metabolism. The second experiment evaluated the growth performance, metabolic responses, and changes in intestinal microbiome composition of nursery pigs fed a variety of feed additives and antibiotic controls. Only the antibiotic group had improved growth performance over the negative control. Although none of the feed additives tested had an effect on alpha or beta microbiome diversity, supplementing multiple herbal blends increased the relative abundance of cecal bacteria in the genus Lactobacillus. In addition, the effect of experiment location had a greater influence on the microbiome than the effect of dietary treatment. Overall, these experiments identified that antibiotic growth promotion could use a mechanism involving bile acid metabolism, but this was not consistent when a different antibiotic was used. In addition, the proposed antibiotic alternatives had a minimal impact on animal growth, microbiome, and metabolism, but experiment location significantly impacted these parameters and this effect should be further evaluated.

ISBN: 9798790626661Subjects--Topical Terms:

3174829
Animal sciences.
Subjects--Index Terms:

Clostridia family

A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine.
LDR:02868nmm a2200325 4500 001 2351429
005 20221107085641.5
008 241004s2021 ||||||||||||||||| ||eng d
020 $a 9798790626661
035 $a (MiAaPQ)AAI28868587
035 $a AAI28868587
040 $a MiAaPQ $c MiAaPQ
100 1 $a Trudeau, Michaela P. $3 3690999
245 1 0 $a A Microbiome and Metabolome Analysis of Antibiotic Growth Promotors and Antibiotic Alternatives Fed to Swine.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 187 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-08, Section: B.
500 $a Advisor: Shurson, Gerald C.;Urriola, Pedro E.
502 $a Thesis (Ph.D.)--University of Minnesota, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The mechanisms of action for antibiotic growth promotion are poorly understood, making it difficult to select effective alternatives capable of providing similar responses. The objective of this thesis was to identify mechanism of action when feeding growth promoting levels of antibiotics and antibiotic alternatives. The first trial identified tylosin-responsive metabolites in growing pigs. This experiment identified that feeding tylosin increased the concentration of the secondary bile acids hyodeoxycholic acid and lithocholic acid and multiple bacteria in the Clostridia family. These findings suggest the mechanism of growth promotion involves an alteration in bile acid metabolism. The second experiment evaluated the growth performance, metabolic responses, and changes in intestinal microbiome composition of nursery pigs fed a variety of feed additives and antibiotic controls. Only the antibiotic group had improved growth performance over the negative control. Although none of the feed additives tested had an effect on alpha or beta microbiome diversity, supplementing multiple herbal blends increased the relative abundance of cecal bacteria in the genus Lactobacillus. In addition, the effect of experiment location had a greater influence on the microbiome than the effect of dietary treatment. Overall, these experiments identified that antibiotic growth promotion could use a mechanism involving bile acid metabolism, but this was not consistent when a different antibiotic was used. In addition, the proposed antibiotic alternatives had a minimal impact on animal growth, microbiome, and metabolism, but experiment location significantly impacted these parameters and this effect should be further evaluated.
590 $a School code: 0130.
650 4 $a Animal sciences. $3 3174829
653 $a Clostridia family
653 $a Tylosin-responsive metabolites
653 $a Antibiotic growth promotion
690 $a 0475
710 2 $a University of Minnesota. $b Animal Sciences. $3 2093074
773 0 $t Dissertations Abstracts International $g 83-08B.
790 $a 0130
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28868587