Abstract:
A cross-sectional study was conducted in west Darfur state Elgenaina to estimate prevalence of caprine brucellosis and identify associated risk factors.
This study was done between December2014 and February 2015.
A total of 270 goats were selected using cluster sampling method, and at the same time data such as sex, age and breed were also recorded .The samples were diagnosed using .Rose Bengal test (RBT), to detect the brucella seropositivity.
The risk factor identification was done simultaneously with the blood sampling. The factors assessed included: age, sex, breed, presence of abortion, presence or retained placenta, parity, type of production, sharing male, contact with other animals and herd size.
The overall prevalence was 4.8%.Out of 10 variables screened in the univarite analysis using the Chi-square test , only 5 variables were significant with p-value ≤ 0.25.the variables that had significant association with seropositivity of caprine brucellosis were : age (p-value= 0.029 ) , (abortion (p-value= 0.000 ),parity (p-value= 0.115 ),type of production (p-value= 0.040) and sharing male (0. 046)
The prevalence of brucella infection according to age of goat was 2.97 % in animals less than 2 years and 8.62 % in animals from 2 to 4 years and 0 % in animals more than four years, according to six were 5.17% in female and 0% in male , according to breed were 5.98% in local breed and 0% in cross breed . Prevalence of abortion were 24% in animal aborted and 2.85% in animal not aborted.
The results of the univariate analysis by using the Chi-square for the following potential risk factors were: Age. (P-value=.029), Sex (p-value=.309), breed (p-value=.370), abortion (p-value=.000), history of retained placenta (p-value=.303),
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Parity (p-value=.115), type of production (p-value=. (P-value=.040), sharing male (p-value=.0.046), contact with other animal (p-value=.610) and herd size (p-value=.754).
These factors were considered for further analysis using forward logistic regression analysis, and the final model revealed only one variable with p-value ≤ 0.05. A significantly (p-value=0.000) higher prevalence of brucellosis was recorded in animal aborted (24%) than animal not aborted (2.85%).
