| Summary: | 碩士 === 國立臺灣大學 === 獸醫學研究所 === 87 === ABSTRACT
Analysis of the occurrences of fowl cholera (FC) during January 1986 to December 1995 showed that FC took placed every month. May, September , and July were the months of higher rate for the FC outbreaks especially in 1990 and 1989, which averaged as 9.6, 7.8, and 9.5 cases respectively. According to the 3 months moving average , the 12 months moving average and regression analysis, it is showed that the occurrences of FC slowly declined, especially in ducks.
In this study, 29 cases of FC and the controls were collected around Taiwan through October 1996 to April 1998. Significant time-space clustering was demonstrated and indicated the spread of the FC during the investigation period. To elucidate the risk factors for the outbreak of FC, 23 cases of FC and 23 controls were collected around Taiwan through October 1996 to April 1998. The results showed that the rate of FC occurrence was higher in larger duck flocks
, in the duck farms occupied government territories and use rice stalks as bedding than in control groups ( p values were 0.044, 0.072, and 0.084 respectively ). As in chicken, the farmers with the elementary school level educational background has a higher probabilities of FC occurrences than control ( p = 0.11 ). To analysis all cases of FC, the farmers who contacted frequently with venders of drugs and feeds had the higher probability of FC occurrences than the control ( p= 0.085 ).
In conclusion, the risk factors for the occurrences of FC involved farmers contacted frequently with venders of drugs and feeds, raising larger number of birds, occupied government territories and use rice stalks as bedding. These risk factors probably play an important role in FC epidemiology .
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