Spirochete

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spirochete

[′spī·rə‚kēt]
(microbiology)
The common name for any member of the order Spirochaetales.

Spirochete

 

a bacterium, measuring 0.1–0.6 micrometer in diameter and 5–500 micrometers in length, in the form of an elongated coiled spiral. The majority of species have a slender axis filament around which the body of the cell is spirally coiled. Spirochetes lack flagella and are characterized by undulating movements, during which the cells rotate around their long axis. Reproduction is by transverse fission.

Spirochetes may be nonpathogenic or pathogenic. The former inhabit freshwaters, and the latter parasitize mollusks and cause syphilis in man (Treponema pallidum), relapsing fever (Borrelia recurrentis), and other spirochetoses. Under artificial conditions, nonpathogenic spirochetes grow on ordinary nutrient mediums and pathogenic spirochetes grow on mediums that contain serum and pieces of fresh tissue or the internal organs of animals. Some forms have not yet been grown in the laboratory.

References in periodicals archive ?
Lyme spirochetes are found in the lining of the bladder wall.
turicatae from the soldier (3) confirms that this spirochete species is a zoonotic pathogen.
These findings are supportive of those described by De Brito and colleagues, (4) who described the cross-reactivity of the spirochetes of intestinal spirochetosis with both anti-T pallidum and antiLeptospira interrogans antibodies.
Following local replication in the skin, spirochetes disseminate widely to multiple organs.
33) The plaque samples were collected in 2 ml of saline containing test tubes and were kept in ice containers to bring down the oral temperatures as at higher temperatures, the motility of spirochetes is lost.
Borrelia miyamotoi is a spirochete related to Borrelia burgdorferi, the microorganism that causes Lyme disease, and is transmitted by the same four tick species that carry B.
Erythema migrans (EM) is a characteristic rash seen in patients with certain spirochete infections.
In order to investigate Ornithodoros tholozani infection of Borrelia spirochetes, experiments were carried out in 3 different stages.
Human-targeted approaches to blocking transmission of the Lyme disease spirochete include vaccines and antibiotic prophylaxis.
However, it must be noted that presence of fecal spirochetes does not coincide with symptomatology.
Specific antibodies against Borrelia burgdorferi appear in 11-13% of healthy persons in Poland, which indicates the contact of these persons with spirochetes and asymptomatic course of LD [18].
The highest dilution of serum showing fluorescing spirochetes was considered to be the end point.