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Investigation of environmental factors and their effects on turkey health

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Title: Investigation of environmental factors and their effects on turkey health
Author: Sanei, Babak
Department: Department of Animal and Poultry Science
Advisor: McMillan, Ian
Abstract: During the first stage of this study, a complete statistical analysis was performed on condemnation records from 1991-1997 at the four main processing plants in Ontario. Results of this part of the investigation indicated that airsacculitis was responsible for 14-36.5 percent of all condemnations, followed by cellulitis, which accounted for 14-21 percent of all condemnations. Toms showed a significantly higher condemnation rate (4.3 percent) than hens and broilers with 1.4 and 1.2%, respectively. Regarding airsacculitis, there was a significant difference of seasonal effect, being highest in winter and lowest in fall. In the second stage of this study, trends of important environmental factors (ammonia levels in air, litter moisture, relative humidity and temperature and total bacteria and 'E. coli' counts in the litter) at different ages and their effects on the condemnation rates due to airsacculitis and cellulitis were assessed. High concentrations of ammonia in the grower barn clearly increased the condemnation rates of airsacculitis in turkey flocks. Total 'E. coli' counts in the litter of the grower barn appeared to be an important factor in increasing the prevalence of cellulitis. It was also shown that lower levels of litter moisture and lower relative humidity had positive effects on the condemnation rates due to cellulitis.
Date: 2000
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