Microbiology All of the following are true regarding Haemophilus influenzae except A It can be a part of the normal flora in some persons B The serotyping is based on the bacterial outer membrane proteins C It requires Haemin and NAD for growth in culture medium D Type b is responsible for invasive disease 💡 Explanation All of the following are true regarding Haemophilus influenzae except ✓ Correct Answer: B. The serotyping is based on the bacterial outer membrane proteins