The Effects of Direct-Fed Microbials on Performance and Digestive Tract Morphology of Neo-Natal/Transition Hostein Bull Calves

Persistent Link:
http://hdl.handle.net/10150/193345
Title:
The Effects of Direct-Fed Microbials on Performance and Digestive Tract Morphology of Neo-Natal/Transition Hostein Bull Calves
Author:
Dick, Karianne
Issue Date:
2006
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Calf diarrhea or scours is one of the most significant and costly problems dairy producers face on a daily basis. A study was designed and conducted to evaluate the effects of direct-fed microbials on the performance and digestive tract morphology of neo-natal/transition Holstein bull calves. Treatments consisted of a control (n = 21) and a treatment (n = 22) of direct-fed microbial (5 x 108 cfu) supplemented daily. Samples of the rumen, duodenum, and ileum were harvested at the time of slaughter and examined for differences in morphology. Although the direct-fed microbial did not effect performance, it positively effected the ruminal papillae as well as the ileal villi. These data indicate that direct-fed microbials may increase the nutrient absorptive surface area of the rumen and ileum, resulting in a healthier digestive tract.
Type:
text; Electronic Thesis
Keywords:
direct-fed microbials; calves; digestive tract morphology; performance
Degree Name:
MS
Degree Level:
masters
Degree Program:
Animal Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Duff, Glenn C.
Committee Chair:
Duff, Glenn C.

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleThe Effects of Direct-Fed Microbials on Performance and Digestive Tract Morphology of Neo-Natal/Transition Hostein Bull Calvesen_US
dc.creatorDick, Karianneen_US
dc.contributor.authorDick, Karianneen_US
dc.date.issued2006en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractCalf diarrhea or scours is one of the most significant and costly problems dairy producers face on a daily basis. A study was designed and conducted to evaluate the effects of direct-fed microbials on the performance and digestive tract morphology of neo-natal/transition Holstein bull calves. Treatments consisted of a control (n = 21) and a treatment (n = 22) of direct-fed microbial (5 x 108 cfu) supplemented daily. Samples of the rumen, duodenum, and ileum were harvested at the time of slaughter and examined for differences in morphology. Although the direct-fed microbial did not effect performance, it positively effected the ruminal papillae as well as the ileal villi. These data indicate that direct-fed microbials may increase the nutrient absorptive surface area of the rumen and ileum, resulting in a healthier digestive tract.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectdirect-fed microbialsen_US
dc.subjectcalvesen_US
dc.subjectdigestive tract morphologyen_US
dc.subjectperformanceen_US
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineAnimal Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorDuff, Glenn C.en_US
dc.contributor.chairDuff, Glenn C.en_US
dc.identifier.proquest1804en_US
dc.identifier.oclc659746343en_US
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