Gram Negative Coccobacilli
All are true about H. Influenzae except:
|B||Typing is by Quellung reaction|
|D||Factor X is NAD|
Factor X is heme whereas factor V is NAD.
Capsular antigen is typed by quellung reaction into 6 capsular types, a to f.
H. influenza causes laryngoepiglottitis, meningitis, pneumonia, otitis media, sinusitis.
It is the most common cause of acute exacerbations of COPD.
H. influenzae exhibit satellitism, as it requires X & V factor