What is the shape of Mycobacterium leprae?

Infectious Agent Leprosy is cause by infection with an intercellular pathogen known as Mycobacterium leprae. M. leprae is a strongly acid-fast, rod-shaped bacterium. It has parallel sides and rounded ends, measuring 1-8 microns in length and 0.2-0.5 micron in diameter, and closely resembles the tubercle bacillus.

What is the shape of Mycobacterium?

Mycobacteria are Gram-positive, acid-fast and (G + C) rich (62 – 70%); they are aerobic and rod shaped and mycolic acids are components of their cell walls (for review see Wayne and Kubica, 1986). Other bacteria including Nocardia, Rhodococcus and Corynebacterium have related properties (see Table 1).

Is Mycobacterium leprae Gram-positive or negative?

Gram-positive bacillus
Mycobacterium leprae is an acid-fast intracellular Gram-positive bacillus, which shows tropism for macrophages and Schwann cells. Leprosy is the chronic granulomatous disease caused by M.

What is the size of Mycobacterium leprae?

3.3 Mb
The M. leprae genome is 3.3 Mb, circular and has an average G+C content of 57.8%. Comparison with its close relative, Mycobacterium tuberculosis reveals that M. leprae might have lost ∼2000 genes from its common mycobacterial ancestor.

Is Mycobacterium leprae motile?

Mycobacterium leprae is an acid fast bacillus, non motile, non spore forming, straight or slightly curved bacterium, responsible for causing leprosy.

Does Mycobacterium leprae have a capsule?

M. leprae is a straight rod shaped bacillus 1-8 m long and 0.3 m diameter. Its capsule is composed of two lipids, phthiocerol dimycoserosate and a phenolic glycolipid, chemically unique and antigenically specific to M.

What is the arrangement of Mycobacterium tuberculosis?

The cell envelope of Mtb comprises four main layers: (i) the plasma membrane or inner membrane, (ii) the peptidoglycan–arabinogalactan complex (AGP), (iii) an assymetrical outer membrane or ‘mycomembrane’, that is covalently linked to AGP through the mycolic acids, and (iv) the external capsule [22].

How do I identify Mycobacterium leprae?

leprae can be rapidly detected and identified using PCR-RFLP. The new PCR/restriction enzyme pattern would help to arrive at the differentiation between leprosy and other mycobacterial infectious cases. It also had shown an advantage to detect the clinical samples from paraffin-embedded skin biopsy and fresh tissues.

Does Mycobacterium leprae have flagella?

The bacterium has neither cilia or flagella, and is therefore non-motile. Its hydrophobic cell wall contains a high concentration of lipids which repels water.