Table of Contents
What does Spirillum do to humans?
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.
What disease does Spirillum cause?
Spirillum minus, a short, spiral bacterium, is a cause of rat-bite fever. S. minus is more common in Asia than in the US and elsewhere in North America, where most cases of rat-bite fever are caused by Streptobacillus moniliformis. In Japan, the disease is known as sodoku (so, “rat”; doku, “poison”).
Where can Spirilla bacteria be found?
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 kind of bacteria is Spirilla?
A spirillum (plural spirilla) is a rigid spiral bacterium that is Gram-negative and frequently has external amphitrichous or lophotrichous flagella. Examples include: Members of the genus Spirillum. Campylobacter species, such as Campylobacter jejuni, a foodborne pathogen that causes campylobacteriosis.
Does Spirilla cause Lyme disease?
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.
How do you treat Spirilla bacteria?
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).
Does spirilla cause Lyme disease?
Is Murein a peptidoglycan?
Peptidoglycan or murein is a polymer consisting of sugars and amino acids that forms a mesh-like peptidoglycan layer outside the plasma membrane of most bacteria, forming the cell wall.
What is the difference between spirochetes and spirilla?
Spirilla are longer, rigid, corkscrew spiral-shaped bacteria. Examples include Campylobacter jejuni. ○ Spirochetes are long, thin and more flexible corkscrew-shaped bacteria.
What happens if you go untreated for Lyme disease?
Untreated Lyme disease can cause: Chronic joint inflammation (Lyme arthritis), particularly of the knee. Neurological symptoms, such as facial palsy and neuropathy. Cognitive defects, such as impaired memory.
Can Lyme cause liver damage?
A new study suggests that persistent infection may cause hepatitis (inflammation of the liver) in Lyme disease. The study was published in the online journal Research Open Access.
Is rat bite fatal?
The risk of infection due to a rat bite is around 10% , and children living in poverty have the highest risk of developing rat-bite fever (RBF) as a result. Without antibiotic treatment, RBF can cause severe complications, including damage to bones and inflammation of the heart, brain, and spinal cord. It can be fatal.