Obligate pathogens such as Mycobacterium tuberculosis, Mycobacterium bovis, and Mycobacterium leprea are highly pathogenic in animals. These species can cause tuberculosis and leprosy, debilitating diseases that may lead to death or disfigurement. These pathogens can only survive inside the host organism.
How does Mycobacterium smegmatis grow?
Mycobacterium smegmatis, “smeg,” is used as the host bacterium. It is a non-pathogenic, common soil organism that forms colonies on an agar plate in around 4 days. The bacteria can also be grown at room temperature using different methods, such as with a stir bar and stir plate.
Why do we study Mycobacterium smegmatis?
Use in research smegmatis is useful for the research analysis of other Mycobacteria species in laboratory experiments. M. smegmatis is commonly used in work on the Mycobacterium genus due to it being a “fast grower” and non-pathogenic. smegmatis as a model for mycobacterial species.
Is Mycobacterium smegmatis shape and arrangement?
This bacteria is an acid-fast, bacillus-shaped, aerobic microorganism that is commonly used a surrogate model for M. tuberculosis and is found in soil, plants, and water.
What is the cell arrangement of Mycobacterium smegmatis?
Mycobacterium smegmatis str. MC2 155
| Names | Mycobacterium smegmatis str. MC2 155 |
|---|---|
| Cell arrangement | Singles |
| Sporulation | Nonsporulating |
| Metabolism | NA |
| Energy source | Chemoorganotroph |
How do you make 7H9 media?
To prepare 450ml Middlebrook 7H9 medium:
- Weigh out 2.35 grams of Middlebrook 7H9 broth base and dissolve in distilled water in a suitable autoclavable container.
- Add 2ml of glycerol or 0.5g of Tween 80.
- Aliquot into smaller quantities for autoclaving, to reduce the risk of contamination during repeated use.
Do mycobacteria have a cell wall?
The distinguishing feature of mycobacteria, the complex cell wall, is a well-recognized drug target. The cell wall is common to all bacteria, both Gram-positive and Gram-negative, but can have vast differences in terms of the biochemical and structural features.
What arrangement is Mycobacterium smegmatis?
What is the shape of Mycobacterium smegmatis?
bacillus-shaped
This bacteria is an acid-fast, bacillus-shaped, aerobic microorganism that is commonly used a surrogate model for M. tuberculosis and is found in soil, plants, and water.
Does Mycobacterium smegmatis have a capsule?
The small pink bacilli above are Mycobacterium smegmatis, an acid fast bacteria because they retain the primary dye. The darker staining cocci are Staphylococcus epidermidis , a non-acid fast bacterium. This is a combination of a negative stain and a simple stain. The pink bacilli can be seen within a clear capsule.
How do you make OADC?
Autoclave at 121°C for 15 minutes. Remove from the autoclave and cool to at least 45°C in a water bath. Aseptically add 50ml of oleic acid-albumin-dextrose-catalase (OADC). Label with name and date of preparation.
How do you make 7H9 broth?
Middlebrook 7H9 Broth Base with added enrichment is recommended for cultivation and sensitivity testing of Mycobacterium tuberculosis . Suspend 2.35 grams in 450 ml distilled water. Add either 1 ml glycerol or 0.25 g polysorbate 80. Heat if necessary to dissolve the medium completely.
