Which species of Haemophilus requires only X factor (hemin)?

Which species of Haemophilus requires only X factor (hemin)?

Which species of Haemophilus requires only X factor (hemin)?









A. H. influenzae
B. H. parainfluenza
C. H. parahaemolyticus
D. H. haemolyticus
E. H. ducreyi














Answer: E