Herd vaccination dynamics

Question 1

What is a DIVA?

Answer 1

Differentiating infected from vaccinated animals

marker vaccine

Question 2

What kind of diseases do you test for using a bulk tank sample?

Answer 2

Any contagious disease

Question 3

What kind of disease do you test individual cows for?

Answer 3

Any eradication process eg bTB

Question 4

What might it tell you if you had antibodies to a disease in the older cows but not the younger groups?

Answer 4

Disease not currently active, possibly historic infection

Question 5

What kind of tube should you use for a sample for ELISA or PCR?

Answer 5

Heparin tube so doesn’t clot

Question 6

How do you take a milk saple for serology/PCR?

Answer 6

Tube with preservative

DON’T DIP INTO THE BULK TANK

Question 7

How should you collect a milk sample for culture?

Answer 7

Sterile milk pot WITHOUT preservative

Question 8

How specific is current TB testing?

Answer 8

99.9%

Question 9

How sensitive is current TB testing?

Answer 9

80%