Effect of vaccination in the field with the Theileria annulata (Hisar) cell culture vaccine on young calves born during the winter season
IR@IMTECH: CSIR-Institute of Microbial Technology, Chandigarh
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| Title |
Effect of vaccination in the field with the Theileria annulata (Hisar) cell culture vaccine on young calves born during the winter season
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| Creator |
Khatri, Neeraj
Nichani, A.K. Sharma, R.D. Khatri, M. Malhotra, D.V. |
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| Subject |
RZ Other systems of medicine
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| Description |
The responses were monitored of young crossbred calves vaccinated against tropical theileriosis during
the winter against a ¢eld tick challenge in the disease season. Thirty-eight calves below 2 months of age,
born after the end of the disease season, were selected at an organized farm. Twenty-¢ve animals were
vaccinated with Theileria annulata (Hisar) cell culture vaccine (developed at CCS HAU Hisar
laboratory) after the end of the disease season and 13 calves were kept as non-vaccinated controls.
These calves were observed for their susceptibility to theileriosis in the new disease season. There was
an increase in antibody titre in 18 of the 25 vaccinated animals one month after vaccination. The
antibody titre then declined gradually, but remained higher than those of the non-vaccinated animals at
month 0. No fever or other clinical signs of tropical theileriosis were observed in any of the vaccinated
animals. Nine out of 25 (36%) vaccinated calves showed occasional piroplasms (50.5%) in blood
smears. All the vaccinated animals withstood the ¢eld tick challenge. On the other hand, 9 of the 13
(69%) unvaccinated calves exhibited occasional piroplasms, and included three clinical cases of tropical
theileriosis. These observations suggest that young crossbred calves vaccinated with the T. annulata
(Hisar) cell culture vaccine at the end of the disease season were relatively resistant during the next
disease season.
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| Publisher |
Springer Science
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| Date |
2001
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://crdd.osdd.net/open/855/1/neeraj2001.pdf
Khatri, Neeraj and Nichani, A.K. and Sharma, R.D. and Khatri, M. and Malhotra, D.V. (2001) Effect of vaccination in the field with the Theileria annulata (Hisar) cell culture vaccine on young calves born during the winter season. Veterinary Research Communications, 25 (3). pp. 179-188. ISSN 01657380 |
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| Relation |
http://dx.doi.org/10.1023/A:1006473307868
http://crdd.osdd.net/open/855/ |
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