![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/Screenshot-2023-05-03-105928.png)
Nobilis® IB Ma5
5. When last did you evaluate your Mass protection?
Figure 1: Percentage data of condemnation by airsacullitis over a period of 21 months. The periods where both vaccines were used and the degree of challenge (low or high) can be observed.
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/image.png?w=960)
Figure 2: Percentage data of condemnation by collibacilosis over a period of 21 months. The period where both vaccines were used by the degree of challenge (low or high) can be observed.
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/image-1.png?w=960)
Figure3: Percentage data of condemnation by airsacculitis and collibacilosis (added) over a period of 21 months. The period where both vaccines were used and the degree of challenge (low or high) can be observed.
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/image-2.png?w=960)
Figure 4: Chart referring to percentage data of condemnation by airsacculitis and colibacillosis (combined) during months of high challenge, showing the difference between the two Mass vaccines.
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/image-3.png?w=960)
Assayag, J. et al. (2012) ‘Performance of vaccines containing different Massachusetts strains of infectious bronchitis virus in the slaughterhouse condemnations,’ p. 189 -193.
Testimonial
Aris Malo, DVM
“..Clears the air about IB variants,
the challenges of control
programs and the value of using
a Protectotype strategy with
vaccines of different serotypes.”
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/image-13.png)
![](https://www.msd-animal-health.co.za/wp-content/uploads/sites/30/2023/05/Screenshot-2023-05-03-085214-edited.png?w=904)