Biochemical Test of Haemophilus parainfluenzae

Biochemical Test of Haemophilus parainfluenzae

Some of the characteristics are as follows:

Basic Characteristics

Properties (Haemophilus parainfluenzae)

Capsule Variable
Catalase Variable
Gas Variable
Gram Staining Gram-negative (-ve)
H2S Positive (+ve)
Hemolysis Negative (-ve)
Indole Variable
Motility Negative (-ve)
Nitrate Reduction Positive (+ve)
Nitrite Reduction Positive (+ve)
Oxidase Positive (+ve)
Shape Small, pleomorphic rods, usually with long, filamentous forms.
Urease Variable
V-factor requirement Positive (+ve)

Fermentation of

Adonitol Negative (-ve)
Arabinose Negative (-ve)
Cellobiose Negative (-ve)
Dulcitol Negative (-ve)
Erythritol Negative (-ve)
Fructose Positive (+ve)
Galactose Positive (+ve)
Glucose Positive (+ve)
Glycerol Variable
Inositol Negative (-ve)
Inulin Negative (-ve)
Lactose Negative (-ve)
Maltose Positive (+ve)
Mannitol Negative (-ve)
Mannose Positive (+ve)
Melibiose Negative (-ve)
Raffinose Variable
Rhamnose Negative (-ve)
Salicin Negative (-ve)
Sorbitol Negative (-ve)
Sorbose Negative (-ve)
Sucrose Positive (+ve)
Trehalose Negative (-ve)
Xylose Negative (-ve)

Enzymatic Reactions

Alkaline Phosphatase Positive (+ve)
Arginine Dihydrolase Negative (-ve)
Esculin Hydrolysis Negative (-ve)
Fucosidase Negative (-ve)
IgA1 protease Negative (-ve)
Lysine decarboxylase Variable
ONPG (β-galactosidase) Variable
Ornithine Decarboxylase Variable

References

  1. Bergey’s Manual of Systematic Bacteriology Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria.
  2. https://www.microbiologyresearch.org/docserver/fulltext/ijsem/28/1/ijs-28-1-20.pdf?expires=1555943745&id=id&accname=guest&checksum=62D277D20357271EE2C65A513EF17921
  3. https://www.sciencedirect.com/topics/medicine-and-dentistry/haemophilus-parainfluenzae
  4. https://jcm.asm.org/content/jcm/11/1/22.full.pdf
  5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC275054/
  6. https://www.ncbi.nlm.nih.gov/pubmed/6979159
  7. https://www.cdc.gov/hi-disease/about/diagnosis-treatment.html

About Author

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Sagar Aryal

Sagar Aryal is a microbiologist and a scientific blogger. He attended St. Xavier’s College, Maitighar, Kathmandu, Nepal, to complete his Master of Science in Microbiology. He worked as a Lecturer at St. Xavier’s College, Maitighar, Kathmandu, Nepal, from Feb 2015 to June 2019. After teaching microbiology for more than four years, he joined the Central Department of Microbiology, Tribhuvan University, to pursue his Ph.D. in collaboration with Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Saarbrucken, Germany. He is interested in research on actinobacteria, myxobacteria, and natural products. He has published more than 15 research articles and book chapters in international journals and well-renowned publishers.

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