Author Archives: finditout1

Hemophilus influenzae also called ‘ Pfeiffer bacillus ‘/ influenza bacillus Morphology & Taxonomy Gram -ve coccobacillus Non motile Non sporing Cells from older cultures exhibit pleomorphism Capsulated strains are pathogenic Classification By Pitman 6 capsular types ‘ a to f ‘ Based on capsular polysaccharide 95% of H. influenzae isolates from acute invasive disease belongsContinue reading “Haemophilus – summary”

Etiological agent of Whooping cough/ pertussis Morphology & Taxonomy Gram -ve coccobacillus Capsulated Non motile Non sporing ‘Thumb print’ appearance – in culture films Bipolar metachromatic granules stained by toulidine blue Species include B. pertussis – causes Whooping cough B. parapertussis – infrequent cause of Whooping cough ; differentiated from the former by the abilityContinue reading “Bordetella – summary”

Normal inhabitants of upper respiratory tract Most prevalent organisms in Pneumonia & Otitis media in children Morphology & Taxonomy Gram +ve Diplococci – lanceolate shaped/ flame shaped Slightly elongated cocci, one end rounded & other end pointed Broad ends in apposition Differentiating features from other streptococcus Its morphology – diplococci Bile solubility Optochin sensitivity SpecificContinue reading “Pneumococcus – Summary”

Vibrio – derived from characteristic vibrating motility V. cholera – causes cholera, first isolated by Koch Morphology & Taxonomy Gram -ve Curved bacilli – comma shaped Actively motile – single polar flagellum – darting motility Fish in stream appearance Swarm of gnats appearance – when actively motile Classification Heiberg – 6 groups based on fermentationContinue reading “Vibrio – summary”