Differentiation of Species of Haemophilus (Histophilus)

Question 1

Haemophilus Influenzae

Answer 1

• Factor requirement: X and V
• Haemolysis: No
• Fermentation: Glucose

Question 2

Haemophilus Haemoliticus

Answer 2

• Factor requirement: X + V
• Haemolysis: Yes
• Fermentation: Glucose

Question 3

Haemophilus Ducrei

Answer 3

• Factor requirement: X
• Haemolysis: None
• Fermentation: None

Question 4

Haemophilus Parainfluenzae

Answer 4

• Factor requirement: V
• Haemolysis: None
• Fermentation: Glucose and Sucrose

Question 5

Haemophilus Parahaemoliticus

Answer 5

• Factor requirement: V
• Haemolysis: Yes
• Fermentation: Glucose and Sucrose

Question 6

Haemophilus Segnis

Answer 6

• Factor requirement: V
• Haemolysis: None
• Fermentation: Glucose and Sucrose (Variable)

Question 7

Haemophilus Paraphrophilus

Answer 7

• Factor requirement: V
• Haemolysis: None
• Fermentation: Glucose, Sucrose and Lactose

Question 8

Histophilus Somni

Answer 8

• Factor requirement: None
• Haemolysis: None
• Fermentation: Glucose, Sucrose, Lactose