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Efficacy Porcilis PRRS - field trial, Italy

A field trial in Italy showing how there was a significant improvement in overal herd performance after vaccination.

629 pigs were vaccinated with Porcilis PRRS at 6 weeks of age. Data from the vaccinated pigs were compared with data from 635 unvaccinated pigs. All pigs received two vaccinations against Mycoplasma before weaning.

Parameters recorded on the farm

	Vaccinated	Controls
Mortality	1.75	4.41
Probability of survival	95.4%*	92.8%
% treated pigs	23.6%	59.8%
Prevalence of pneumonia	36%**	54%
Prevalence of pleuritis	2.3%**	12%

* p<0.01 (log-rank test); **p

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Mortality rate of pigs during the trial for vaccinated and control groups

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The probability of survival time in days for the vaccinated and control groups

The percentage of animals treated by injection in vaccinated and control groups was respectively 23.6 and 59.8. The RR of having a treatment for pneumonia in vaccinated pigs vs control pigs was 0.3979 (cl95%= 0.3405 - 0.4649).

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The number of injections given per day for the vaccinated and the control groups

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The presence of lung lesions in the control and vaccinated groups

The results of this trial were:

• Reduction of mortality in the vaccinated group
• Substantial reduction in percentage of animals requiring antibiotic, injectable treatment
• Less lung lesions due to respiratory disease in vaccinated pigs
• Increased probability of survival of vaccinated pigs

Conclusion

In this study there was a significant improvement of the overall herd performance.