CORRELATION BETWEEN ANTIBODIES TO COWDRIA-RUMINANTIUM (RICKETTSIALES) IN CATTLE AND THE DISTRIBUTION OF AMBLYOMMA VECTOR TICKS IN ZIMBABWE

被引：10

作者：

DEVRIES, N ^{[1
]}

MAHAN, SM ^{[1
]}

USHEWOKUNZEOBATOLU, U ^{[1
]}

NORVAL, RAI ^{[1
]}

JONGEJAN, F ^{[1
]}

机构：

[1] UNIV UTRECHT,FAC VET MED,DEPT PARASITOL & TROP VET MED,TICK RES UNIT,3508 TD UTRECHT,NETHERLANDS

来源：

EXPERIMENTAL & APPLIED ACAROLOGY | 1993年 / 17卷 / 11期

关键词：

D O I：

10.1007/BF00225853

中图分类号：

Q96 [昆虫学];

学科分类号：

摘要：

Cowdriosis, caused by Cowdria ruminantium, is transmitted by Amblyomma ticks, which are widely distributed in Zimbabwe. To assess the distribution of this disease in Zimbabwe, cattle either exposed to Amblyomma ticks or maintained in areas free from these ticks were tested for antibodies to Cowdria. A total of 324 sera were tested using competitive ELISA and the indirect fluorescent antibody test (IFAT). At diptanks in Amblyomma-infested areas 52% (n=95) and 26% (n=47) of sera were positive by cELISA and IFAT, respectively. At diptanks in Amblyomma-free areas 11% (n=125) and 10% (n=134) of sera were positive by cELISA and IFAT, respectively. The results were significantly different between Amblyomma-infested and tick-free areas (X(2) = 24.73, P less than or equal to 0.005 for IFAT and X(2) = 57.53, P less than or equal to 0.005 for cELISA). High background readings in field sera, possibly due to cross-reactive antibodies to Ehrlichia spp., complicated the determination of a realistic cut-off point, especially in cELISA. On the basis of the distribution of Amblyomma ticks, currently a large part of Zimbabwe can be considered endemic for the disease.

引用

页码：799 / 810

页数：12

共 26 条

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