Effect of intranasal attenuated Pasteurella multocida B:2 on haemorrhagic septicaemia in calves
This report describes the effect of vaccination with attenuated P. multocida B:2 on wild-type P. multocida B:2 infection in calves. Calves were given 5 ml intranasal 107 CFU/mL live attenuated gdhA derivative of P. multocida B:2. Untreated calves were then mingled with the vaccinated Group. Control...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Online Journal of Veterinary Research
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7064/1/Effect%20of%20intranasal%20attenuated%20Pasteurella%20multocida%20B.pdf http://psasir.upm.edu.my/id/eprint/7064/ http://onljvetres.com/pasteurellaabs2009.htm |
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| Summary: | This report describes the effect of vaccination with attenuated P. multocida B:2 on wild-type P. multocida B:2 infection in calves. Calves were given 5 ml intranasal 107 CFU/mL live attenuated gdhA derivative of P. multocida B:2. Untreated calves were then mingled with the vaccinated Group. Control untreated calves were kept separate. After 6 weeks, all calves were challenged intra-tracheally with 107 CFU/mL of live wild-type P. multocida B:2. At Post-Mortem none of the vaccinated or mingled calves had lesions whereas controls revealed pulmonary petechial haemorrhages with acute pneumonia patches with neutrophils. Both exposed and commingled calves showed significantly (p<0.05) higher levels of serum IgG. P. multocida B:2 were successfully isolated only from the control calves of Group 3. These findings suggest that intranasal exposures to live attenuated P. multocida B:2 prevented infection by wild-type P. multocida B:2 and may have protected susceptible calves. |
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