Theses and Dissertations

Yu-Bin Chou

Issuing Body

Mississippi State University

Advisor

Wills, Robert W.

Committee Member

Magee, Danny L.

Committee Member

Chinling, Wang

Date of Degree

12-14-2018

Document Type

Graduate Thesis - Open Access

Major

Veterinary Medicine Research

Degree Name

Master of Science

College

College of Veterinary Medicine

Department

Department of Pathobiology and Population Medicine

Abstract

Necrotic enteritis (NE) caused by Clostridium perfringens type A is an important bacterial enteric disease of global broiler production. However, the dynamic interactions of NE and its predisposing factors are not fully presented by current studies. By using the System Dynamics (SD) Model, the epidemiological changes in susceptible-infected-removed models of NE and avian coccidiosis and their interactions in one or multiple grow-out cycles was established; meanwhile, the growth performance was measured by the average weights of infected and non-infected populations at harvest were estimated. The SD model provided direct and persuasive outcomes of the epidemiology and ecology of NE compared with models using statistical methodology. With interventions on certain predisposing factors of management practices and medication, effects which decreased disease incidence and growth performance were observed; moreover, the leverage points obtained from interventions on certain management practices provided quantitative results which were applicable and useful for improving the broiler production.

URI

https://hdl.handle.net/11668/20911

Comments

coccidiosis||Eimeria spp.||Clostridium perfringens||poultry disease||system dynamics model||broiler production

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