Haemophilus Influenzae

Morphology

i)                    Shape -  The usual form is minute rod , arranged in pairs or singly or in luster but never in chain . It is so small that it is often termed cocco-bacillus .

ii)                   Size – It is about 1.2 to 1.5 μ in length and about 0.3 μ in breadth .

iii)                 It is non flagellated , so non-motile

iv)                 It is non-sporing

v)                  It is gram negative and non-acid fast bacillus .

Pathogenesis produced by Haemophilus Influenzae

i)                    The influenza bacillus will produce spontaneous disease only in man and it is a member of te normal flora of the  upper respiratory tract  of human beings .

ii)                   It produces brocho pneumonia .

iii)                 It is responsible for antrum infection , otitis media , endocarditis , empyema , arthritis , conjunctivitis and even meningitis .