Haemophilus

Haemophilus

Haemophilus
Haemophilus = “blood loving”Gram-negative , coccobacilli , sometimes pleomorphic.Non-motile.Some strain of H. influenzae Capsulated

Culture characteristics:Haemophilus species require growth factors:X-factor ( hemin) ( produce essential respiratory enzymes : Catalase, Peroxidase,Cytochrom).V-factor (NAD: Nicotinamide Adenine Dinucleotide) ( used as electron carrier in the Oxidation- Reduction System). Blood Agar (X-factor )Chocolate Agar (X &V factor )Filde’s Digest Agar (X & V factor ) Capsulated H. influenzae strain On Chocolate Agar:Large ,semi-opaque, gray-white, mucoid.

Differentiation of Species

Hemolysis
X V
Growth Factor