3

Question 1

What is the principle of haemaglutination inhibition test:

Answer 1

Ability of the specific antibodies to inhibit haemagglutination activity of some viruses
* Positive result: inhibition of blood cell agglutination, RBC sediment in bottom
* Negative result: haemagglutination, diffuse

Question 2

Division of the media used for cell culture:
a) liquid, solid
b) natural, synthetic
c) protein-based, sugar-based

Answer 2

** a) liquid, solid **

Question 3

Complement fixation test is used for detection of:
a) antigen
b) antibody
c) viral genome

Answer 3

b) antibody

Question 4

In sandwich ELISA positive result is:
a) change of colour
b) no colour

Answer 4

a) change of colour

Question 5

Carnivores are born:
a) agamaglobulinemic
b) hypogamaglobulinemic

Answer 5

b) hypogamaglobulinemic

Question 6

What is tropisms of pathogens:

Answer 6

Tendency to penetrate into specific tissue or organ of animal
* Monotropic (rabies)
* Polytropic (canine distemper)
* Pantropic (avian influenza)

Question 7

Name at least three tests for cellular immunity evaluation:

Answer 7

• Flow cytometry
• Fluorescence technique
• Ethidium bromid test
• BrDu assay

Question 8

What is abortive infection:
a) infection causing abortion
b) infection that disappear after prodromal period
c) latent infection in pregnant animals

Answer 8

** b) infection that disappear after prodromal period **

Question 9

What is the role of colostral immunity:

Answer 9

• Protection against septicaemia and organ infection
• Local protection of intestine
• GIT - multilication of bacteria

Question 10

Clinical signs indicating failure of passive transfer of immunity:

Answer 10

• 3-5 days old
• Profuse diarrhoea and dehydration
• Respiratory or systemic infections