Tag: Bacteriology

Haemophilus influenzae: Habitat, Cell Morphology, Cultural Characteristic, Biochemical Tests, Pathogenicity, Diagnosis and Treatment 4.68/5 (37)

Haemophilus influenzae-Gram Staning

Haemophilus influenzae: Habitat, Cell Morphology, Cultural Characteristic, Biochemical Tests, Pathogenicity, Diagnosis and Treatment Habitat Mucous membrane of the upper respiratory tract of humans. Found in the nasopharynx of approx. 75% of healthy peoples. Cell Morphology Slender, short, gram negative rods or coccobacillus 3-0.5 um X 0.5-1 um with rounded ends. Prolonged counterstaining for 5-15 minutes […]

Habitat of Mycobacterium tuberculosis 3.77/5 (22)


Habitat of Mycobacterium tuberculosis Patients with cavitary diseases are primary reservoirs. They are obligate pathogens, facultative or opportunistic pathogens or free living saprophytes. Most of them are found in habitats such as water or soil. It habitat human body from which is transmitted directly from person to person. Mycobacterium tuberculosis Complex contains tuberculosis, M. bovis, […]

Biochemical test for Vibrio cholerae 4.26/5 (81)

Biochemical test for Vibrio cholerae

Biochemical test for Vibrio cholerae ¬≠Basic Characteristics Properties (Vibrio cholerae) Capsule Non-Capsulated Citrate +ve Flagella Flagellated Gas -ve Gelatin Hydrolysis +ve Gram Staining -ve H2S -ve Hemolysis Beta Hemolysis Indole +ve Motility Motile MR (Methyl Red) -ve Nitrate Reduction +ve Oxidase +ve Shape Rods Spore Non-Sporing String Test +ve Urease -ve VP (Voges Proskauer) Variable […]

Cultural Characteristics of Streptococcus 4/5 (28)

Beta-hemolysis on blood agar (Streptococcus pyogenes)

Cultural Characteristics of Streptococcus 1. They are aerobic and facultative anaerobes. 2. They grow best at 37 degree Celsius. 3. Group D grow well at between 10 degree Celsius and 45 degree Celsius. 4. Growth is poor on solid media or broth. 5. Grow well in media containing blood and sugar ( fermentable carbohydrates) and […]

Morphology of Helicobacter pylori 3.86/5 (7)

Gram Stain of Helicobacter pylori ( Gram Negative )

Morphology of Helicobacter pylori 1. They are gram negative, spiral shaped or curved rods bacteria. 2. They are 0.5 – 0.9 um wide by 2 – 4 um long with one to three turns when observed in vivo. 3. They are highly motile with one to four unipolar sheahted flagella. 4. Each flagellum is approx. […]

Habitat of Helicobacter pylori 2.92/5 (12)

Helicobacter pylori in stomach

Habitat of Helicobacter pylori 1. The natural habitat of H. pylori species is gastrointestinal tract of mammals and birds. 2. H. pylori was first identified in human intestinal biopsies in 1983. 3. They inhabit the surface of stomach mucosa. 4. Majority of H. pylori are located adjacent to surface and pit gastric epithelial cells. 5. […]

Microbiology Notes © 2014-2017            Site Created: 17th October, 2014            Copyright            Privacy Policy            Terms of Services            Contact Us Designed By: Sagar Aryal