Variations in the prevalence of antibody to brucella infection in cattle by farm, area and district in Kenya

被引:53
作者
Kadohira, M
McDermott, JJ
Shoukri, MM
Kyule, MN
机构
[1] UNIV GUELPH, DEPT POPULAT MED, GUELPH, ON N1G 2W1, CANADA
[2] UNIV NAIROBI, DEPT PUBL HLTH PHARMACOL & TOXICOL, NAIROBI, KENYA
关键词
D O I
10.1017/S0950268896007005
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
Variations in the sere-prevalence of antibody to brucella infection by cow, farm and area factors were investigated for three contrasting districts in Kenya: Samburu, an arid and pastoral area; Kiambu, a tropical highland area; and Kilifi, a typical tropical coastal area. Cattle were selected by a two-stage cluster sampling procedure and visited once between August 1991 and 1992. Schall's algorithm, a statistical model suitable for multi-level analysis was used. Using this model, older age, free grazing and large herd size (greater than or equal to 31) were associated with higher seroprevalence. Also, significant farm-to-farm, area-to-area and district-to-district variations were estimated. The patterns of high risk districts and areas seen were consistent with known animal husbandry and movement risk factors, but the larger than expected farm-to-farm variation within high risk areas and districts could not be explained. Thus, a multi-level method provided additional information beyond conventional analyses of sere-prevalence data.
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页码:35 / 41
页数:7
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