What disease is caused by spirilla bacteria?

What disease is caused by spirilla bacteria?

cause of rat-bite fever 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.

Is spirilla a Treponema?

The two major pathogens of humans are Treponema pallidum, the agent of syphilis, a sexually transmitted disease, and Borrelia burgdorferi, cause of Lyme Disease, transmitted by the bite of the deer tick. Spirilla are Gram-negative bacteria with a helical or spiral shape.

Are spirilla bacteria?

Spirillum, genus of spiral-shaped bacteria of the family Spirillaceae, aquatic except for one species (S. minus) that causes a type of rat-bite fever in man. The term spirillum is used generally for any of the corkscrew-like species.

What three basic shapes of bacteria can be seen in a simple stain?

The three basic bacterial shapes are coccus (spherical), bacillus (rod-shaped), and spiral (twisted), however pleomorphic bacteria can assume several shapes. Cocci (or coccus for a single cell) are round cells, sometimes slightly flattened when they are adjacent to one another.

What are the 3 main bacteria shapes?

Individual bacteria can assume one of three basic shapes: spherical (coccus), rodlike (bacillus), or curved (vibrio, spirillum, or spirochete).

Can spirilla bacteria be 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).

Is Treponema pallidum a bacteria or virus?

Treponema pallidum is a spirochaete bacterium with various subspecies that cause the diseases syphilis, bejel, and yaws. It is transmitted only amongst humans. It is a helically coiled microorganism usually 6–15 μm long and 0.1–0.2 μm wide.

What do spirochetes look like?

Spirochetes are long and slender bacteria, usually only a fraction of a micron in diameter but 5 to 250 microns long. They are tightly coiled, and so look like miniature springs or telephone cords.

Where can spirilla bacteria be found?

Morphology. Members of the genus Spirillum are large, elongate, spiral shaped, rigid cells. Some have tufts of amphitrichous flagella at both poles. They are microaerophilic and usually found in stagnant freshwater rich in organic matter.

What spirilla means?

Spirilla (singular, Spirillum) are a group of bacteria characterized by a corkscrew (spiral) appearance. They are Gram-negative bacteria and are characterized by motile structures known as flagella.

Where can Spirilla bacteria be found?

What does cocci bacteria look like?

A coccus (plural cocci) is any bacterium or archaeon that has a spherical, ovoid, or generally round shape. Bacteria are categorized based on their shapes into three classes: cocci (spherical-shaped), bacillus (rod-shaped) and spirochetes (spiral-shaped) cells.

What diseases are caused by Treponema pallidum?

Other Treponema pallidum infections

• Syphilis.
• Other Treponema pallidum infections.
• Chlamydia.
• Gonorrhea.
• Chancroid.
• Granuloma Inguinale/Donovanosis.
• Lymphogranuloma Venereum.
• Genital Herpes.