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