tuberculin, brucellosis q 9 - 12 ; 8

Question 1

definition of officially brucellosis free bovine heard

Answer 1

⚫ No clinical signs (for min 12m)
⚫ No vaccination (for min 3y)
⚫ All animals over 12m: – two serological tests (6-12m interval)
⚫ Animals introduced: from officially free herds or tested within 30days
⚫ Regular testing (every year)
⚫ General measures (isolation of the holding, record of comp. laboratory examinations, separate calving, control of
movements of visitors, animals, vehicles, control of dogs and cats on the holding etc.)

Question 2

definition of positive single intradermal tuberculin test

Answer 2

if clinical signs are observed OR there is an increase of 4 mm OR more in the thickness of the fold of skin at the injection site (>4mm)

Question 3

-

Answer 3

-

Question 4

definition of negative single intradermal tuberculin test

Answer 4

if only limited swelling is observed, with an increase of not more than 2 mm in the thickness of the fold of skin without clinical signs such as diffuse or extensive oedema, exudation, necrosis, pain or inflammation of the lymphatic ducts in that region or of the
lymph nodes (<2mm)

Question 5

definition of positive comparative intradermal tuberculin test

Answer 5

positive bovine reaction which is more than 4 mm greater than the avian reaction, OR the presence of clinical signs

Question 6

definition of negative comparative intradermal tuberculin test

Answer 6

a negative bovine reaction, or a positive or inconclusive bovine reaction but which is equal to or less than a positive or inconclusive avian reaction and the absence of
clinical signs in both cases