Haemophilus, Histophilus, Avibacterium, Taylorella spp

Question 1

Where is the usual habitat of Haemophilus suis?

Answer 1

Mucous membranes of upper respiratory tract

Question 2

Give three cellular products of Haemophilus suis

Answer 2

1. Lipooligosaccharides
2. Outer Membrane Proteins
3. Capsular Polysaccharides

Question 3

Which cellular product of Haemophilus suis induces inflammation and immune response?

Answer 3

Lipooligosaccharides

Question 4

2 factors required by Haemophilus spp to grow on chocolate agar

Answer 4

NAD/V-factor & X factor

Question 5

Refers to the growth of bacteria of one type in culture about colonies of another type that supply needed micronutrients or growth factors

Answer 5

Satellitism

Question 6

What are the mode of transmission of Haemophilus suis?

Answer 6

1. Aerosol and direct contact
2. Vertical transmission
3. Fomites

Question 7

Pathogenic effect of Haemophilus suis in Pigs

Answer 7

Glasser’s disease

Question 8

Where is the usual habitat of Histophilus somni?

Answer 8

Mucous membranes of the upper respiratory tract of cattle and sheep

Question 9

A cellular product of Histophilus somni which help evade the host immune system

Answer 9

Immunoglobulin-binding proteins (IgBPs)

Question 10

Histophilus somni grows in blood agar if added with?

Answer 10

CO2

Question 11

What are some pathogenic effects of Histophilus somni in cattle?

Answer 11

Septicaemia, Thrombotic meningoencephalitis, Bronchopneumonia

Question 12

Pathogenic effect of H. somni in young rams

Answer 12

Epididymitis