Which microorganism is a Spirochaete?
spirochete, (order Spirochaetales), also spelled spirochaete, any of a group of spiral-shaped bacteria, some of which are serious pathogens for humans, causing diseases such as syphilis, yaws, Lyme disease, and relapsing fever. Examples of genera of spirochetes include Spirochaeta, Treponema, Borrelia, and Leptospira.
Where are endoflagella found?
Endoflagella (axial filaments) are the flagella-like organelles in the periplasmic space encased by the outer membrane.
What is endoflagella example?
One axial filament rotates in a clockwise orientation; an adjacent axial filament rotates in a counter-clockwise orientation. Rotation of the endoflagella creates torsion and drives the corkscrew rotation of the cell. Fig. 3 An expanded view of the cellular membranes that surround endoflagellum.
Where can spirochetes be found?
Spirochetes are a group of six genera of spiral-shaped, slender bacteria of varying length. They are either free-living or host-associated. They are found in the human oral cavity, gastrointestinal tracts of humans, mammals, insects, and in marine environments.
What is a spiral or corkscrew shaped bacteria?
Spirilla – are spiral or corkscrew shaped bacteria.
Where is the endoflagella located in spirochetes Mcq?
2. Where is the endoflagella located in Spirochetes? Explanation: In spirochetes, the endoflagella or as it is called periplasmic flagella is located between the outer membrane and the protoplasmic cylinder; thus they are located in the periplasmic space of the cell.
Which type of bacteria make endoflagella?
Spirochetes are distinguishable from other bacteria in that they move with unique endoflagella. The flagella are tightly wound around the corkscrew shape of the bacteria, between the outer membrane and the cell wall, within the periplasm. Together, the endoflagella make up a structure called the axial filament.
What is the difference between flagella and endoflagella?
Flagella are cell structures that allow for movement. The spirochetes have a type of flagella called endoflagella. These are bundled together to form an axial filament. Spirilla-shaped bacteria do not have endoflagella; their flagella are external and only connected to one end of the cell.
What are dental spirochetes?
Spirochetes contain enzymes or substances that directly damage to tissue. Oral spirochetes in periodontal diseases release toxic substances and enzymes that are important in development of periodontitis. These products damage to tissue by activating immune responses [71].
What is the scientific name for spirochetes?
Spirochaetae
Spirochaetes/Scientific names
How are endoflagella different from flagella in spirochetes?
Flagella are cell structures that allow for movement. The spirochetes have a type of flagella called endoflagella. These are bundled together to form an axial filament. Spirilla-shaped bacteria do not have endoflagella; their flagella are external and only connected to one end of the cell.
How are the flagella of spirilla-shaped bacteria connected?
These are bundled together to form an axial filament. The axial filaments wrap around the cell body, connect both ends of the cell, and embed in the outer membrane. Spirilla-shaped bacteria do not have endoflagella; their flagella are external and only connected to one end of the cell.
Which is an example of a flagellated bacterium?
Bacterial flagella are a wonder in locomotive ability, able to propel a bacterium 20 bacterial cell lengths per second. Many different types of bacteria have flagella, but one interesting example of a flagellated bacterium is Helicobacter pylori, a spiral-shaped bacillus that causes stomach and duodenal ulcers.
Why is Treponema pallidum an obligate internal parasite?
T. pallidum is an obligate internal parasite, meaning that it requires a mammalian host for survival. In the absence of mammalian cells, T. pallidum will be killed by the absence of nutrients, exposure to oxygen and heat. (1) T. pallidum causes the human disease syphilis.