Table of Contents
What does spirilla do to the human body?
infection caused by the bacterium Spirillum minus (also called Spirillum minor) and transmitted to humans by the bite of an infected rat. It is characterized by infection at the site of inoculation, inflammation of the regional lymph nodes, relapsing fever, chills, and skin rash.
What does spirilla bacteria cause?
The term spirillum is used generally for any of the corkscrew like species. It is a genus of spiral-shaped bacteria (Fig. 7.5) of the family Spirillaceae, aquatic except for one species (S. minus) that causes a type of rat-bite fever in humans.
How is spirillum treated?
Currently, penicillin is the drug-of-choice for the treatment of spirillar rat bite fever. The organism appears to be exquisitely susceptible to penicillin and it has been stated that only 2 doses of procaine penicillin or 1 dose of repository penicillin is adequate for cure (5).
What kingdom is spirillum bacteria in?
Integrated Taxonomic Information System – Report
| Kingdom | Bacteria Cavalier-Smith, 2002 – bactéries, bacteria, bacterias, bactérias |
| Subkingdom | Negibacteria Cavalier-Smith, 2002 |
| Phylum | Proteobacteria Garrity et al., 2005 |
| Class | Betaproteobacteria Garrity et al., 2006 |
| Order | Nitrosomonadales Garrity et al., 2006 |
What disease is caused by spiral-shaped bacteria?
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.
What bacteria is spiral-shaped?
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.
What cell shape is best?
Therefore, if a cell is going to be spherical, it would be best to be the smallest sphere possible, because decreasing size increases the surface-to-volume ratio (i.e., the volume decreases faster than does the area that can service it with nutrients).
What happens when rat bites a man?
The common symptoms of a rat bite are pain, redness, swelling around the bite and, if secondary infection occurs, a weeping, pus-filled wound. Other rat bite symptoms may include those associated with bacterial infections known as streptobacillary rat bite fever and spirillary rat bite fever.
What are the two types of spiral bacteria?
Spiral bacteria can be subclassified by the number of twists per cell, cell thickness, cell flexibility, and motility. The two types of spiral cells are spirillum and spirochete, with spirillum being rigid with external flagella, and spirochetes being flexible with internal flagella.
What kind of shape does a spirilla bacteria have?
Like other Spirilla bacteria, members of the genus Oceanospirillum are characterized by a spiral shape. However, this shape may vary from a fibroid shape which has a single complete turn, to a helical shape with several complete turns depending on the species.
How are spiral bacteria difficult to Gram stain?
Spirochete. A spirochete (plural spirochetes) is a very thin, elongate, flexible, spiral bacteria that is motile via internal periplasmic flagella inside the outer membrane. Owing to their morphological properties, spirochetes are difficult to Gram-stain but may be visualized using dark field microscopy or Warthin–Starry stain.
What kind of oxygen does a spirilla bacteria need?
Like all the other Spirilla bacteria, all members of this group are Gram-negative. They are also mostly microaerophilic and thus require a low level of oxygen to survive.