Determination Of Protective Level Of Specific Antibodies Against Pasteurella Multocida In Vaccinated Cattle
By: Shahid Nasir
| Dr.Muhammad Aamin Sheikh.
Contributor(s): Dr.Kamran | Dr.Sameera Akhtar | Faculty of Veterinary Sciences.
Material type: 
BookPublisher: 2000Subject(s): Department of MicrobiologyDDC classification: 0631,T Dissertation note: The study was conducted on cattle to determine the protective level of specific antibodies against Pasteurella multocida. In this experiment a total of 50 animals were used, maintained at Livestock Production Research Institute (LPRI), Bahadarnagar, 0 kara. Fifty animals were vaccinated with alum precipitated formalized broth culture bacterin vaccine procured from Veterinary Research Institute (VRI), Lahore with a dose rate of 5 ml subcutaneously per animal.
rrhirty of fifty animals randomly were bled for collection of their serum sample on day 0 i.e. before vaccination and thereafter every two weeks post-vaccination till 16 weeks of vaccination are covered. The serum were processed for knowing the specific antibodies against Pasteurella multocida at various stages post- vaccination by IHA test.
The protective level of the specific antibodies against a challenge inoculum of virulent strain of P. multocida Robert's type-I was determined by passive mouse protection (PMP) test. The sera representing each titre of specific antibodies against P.multocida were used for passive immunization of 30 mice prior to their challenge.
GMT value on day 0 i.e. before vaccination was 22.6. The maximum 104 GMT registered on 42' day post-vaccination. Thereafter a decline in titre commenced and titres recorded for 8th 10th, 12th 14th and 16th week post-vaccination included 97, 64, 32,
21.1 and 14.9, respectively.
The sera with indirect haemagglutination (IHA) titre of 1:16 and above protected 100% of the challenged mice and with IHA titre 1:8, 80% protection and sera with IHA titre of 1:4 and below could not survive and 100% mortality was observed and all control mice died in response to challenge.
The maximum individual titre developed was found to be 1:256 and minimum individual titre was found to be 1:4 . The result of this study indicated a great relationship in IHA and PMP tests.
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Thesis
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UVAS Library Thesis Section | Veterinary Science | 0631,T (Browse shelf) | Available | 0631,T |
The study was conducted on cattle to determine the protective level of specific antibodies against Pasteurella multocida. In this experiment a total of 50 animals were used, maintained at Livestock Production Research Institute (LPRI), Bahadarnagar, 0 kara. Fifty animals were vaccinated with alum precipitated formalized broth culture bacterin vaccine procured from Veterinary Research Institute (VRI), Lahore with a dose rate of 5 ml subcutaneously per animal.
rrhirty of fifty animals randomly were bled for collection of their serum sample on day 0 i.e. before vaccination and thereafter every two weeks post-vaccination till 16 weeks of vaccination are covered. The serum were processed for knowing the specific antibodies against Pasteurella multocida at various stages post- vaccination by IHA test.
The protective level of the specific antibodies against a challenge inoculum of virulent strain of P. multocida Robert's type-I was determined by passive mouse protection (PMP) test. The sera representing each titre of specific antibodies against P.multocida were used for passive immunization of 30 mice prior to their challenge.
GMT value on day 0 i.e. before vaccination was 22.6. The maximum 104 GMT registered on 42' day post-vaccination. Thereafter a decline in titre commenced and titres recorded for 8th 10th, 12th 14th and 16th week post-vaccination included 97, 64, 32,
21.1 and 14.9, respectively.
The sera with indirect haemagglutination (IHA) titre of 1:16 and above protected 100% of the challenged mice and with IHA titre 1:8, 80% protection and sera with IHA titre of 1:4 and below could not survive and 100% mortality was observed and all control mice died in response to challenge.
The maximum individual titre developed was found to be 1:256 and minimum individual titre was found to be 1:4 . The result of this study indicated a great relationship in IHA and PMP tests.
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