Author

Ishab Poudel

Advisor

Adhikari, Pratima Acharya

Committee Member

Beck, Mary M.

Committee Member

Kiess, Aaron S.

Date of Degree

12-1-2020

Original embargo terms

Visible to MSU only for 6 months||5/17/2021

Document Type

Graduate Thesis - Open Access

Major

Poultry Science

Degree Name

Master of Science

College

College of Agriculture and Life Sciences

Department

Department of Poultry Science

Abstract

Light-emitting diode (LED) is an improved light delivery technology that provides better energy efficiency, longer lifespan, and the ability to select a specific wavelength of light. We evaluated the effect of blue and red-LED on performance, behavior, egg quality, hormonal concentration, and prevalence of Avian pathogenic E. coli (APEC) like E. coli in pullets and laying hens raised in cageree housing system. Results showed that birds raised in blue-LED during the pullet phase had higher body weight and earlier onset of early lay. Red-LED increased the yolk percentage, illustrating that red-LED can stimulate reproduction. Red-LED also decreased the relative spleen percentage, which is an indication of decreased immunity. Overall egg production was not affected by the light treatment. Irrespective of the light treatment, a higher prevalence of APEC like E. coli was found in colonies isolated from the trachea suggesting a possible route of transmission in cageree housing system.

URI

https://hdl.handle.net/11668/20842

Comments

Light-emitting diode||red-LED||blue-LED||Laying hen

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