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A study on the effect of experimental infection with Theileria annulata on the immune response of cattle vaccinated with cell culture rinderpest vaccine
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Abstract: Cross-breeding Friesian cattle, negative to both rinderpest and Theileria annulata were used in the present study. One group was vaccinated to rinderpest. On being maximally seropositive, On being maximally seropositive, they were divided into a subgroup of two’s. These animals were artificially infected with Theileria annulata in such a manner to represent light, moderate and heavy infestation, respectively.
On confirming Theileria anuualata infection, respectively induced, test animals were reseromonitored for rinderpest neutralizing antibodies. Control animals were kept throughout the study.
Results revealed a significant decrease in serum-rinderpest neutralizing antibody titres. The decrease in titres and the severity of infection were exponential.
In an another experiment, a group of cattle of the same nature, were subjected to an artificially induced acute infection with Theileria annulata. Such animals were subsequently, vaccinated to rinderpest, during the fulminating stage of infection. Serological tests revealed that Theileria acutely infected animals response to rinderpest vaccination was essentially the same as in control ones. It could be concluded that cattle immunized to rinderpest and subsequently exposed to theileriosis, should be considered when a rinderpest control vaccination campaign is undertaken.
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| Publication year |
1997
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| Pages |
203209
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| Availability location |
معهد بحوث الامصال واللقاحات البيطرية
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| Availability number |
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| Organization Name |
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| City |
cairo
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| serial title |
fourth sceintific congress
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| Author(s) from ARC |
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| Agris Categories |
Animal diseases
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| Proposed Agrovoc |
الأبقار-أمراض;
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| Publication Type |
Conference/Workshop
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