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 ?
miyamotoi was not observed in small mammals (10); possible reasons are that the spirochete is rarer in this locality (NIP = 0.4% in Alameda study sites), that mammal capture periods were dispersed across multiple years and not as coincident with nymphal tick activity, or that brush mice and California mice were not captured at that location.
Paired Sample T Test Mean N Pair 1 Klebsiella before 1.5 20 Klebsiella after 1.7 20 Pair 2 Ecoli before 1.68 20 Ecoli after 1.52 20 Pair 3 Spirochete before 1.52 20 Spirochete after 1.63 20 Pair 4 Candida before 1.42 20 Candida after 1.42 20 Pair 5 Staphylococcus before 1.52 20 Staphylococcus after 1.57 20 Pair 6 Lactobacillus before 1.47 20 Lactobacillus after 1.73 20 Pair 7 Streptococcus before 1.36 20 Streptococcus after 1.52 20 Pair 8 Ph before 7.21 20 Ph after 7.31 20 Std.
Human intestinal spirochetosis is characterized by the presence of a layer of spirochetes adherent to the apical epithelial surface of the colorectal mucosa.
The use of PKH staining allowed the subsequent quantification of spirochete association with 8 tick cell lines by flow cytometry and by fluorescence and confocal microscopy.
Such spirochete phenotypes could contribute to the intensity of transmission and the overall risk of Lyme borreliosis.
However, "an extraordinary density of morphologically distinct spirochetes" later identified as B.
In one report of a patient who developed an EM rash after traveling to Maryland and North Carolina, a novel spirochete was detected by PCR from both the patient and the tick still attached to his abdomen.
The risk of transmission of the spirochete (B, Burgdorferi) from the infected deer tick is directly related to how long the tick stays attached (the duration of the feeding).
The spirochete Borrelia burgdorferi belongs to Spirochetaceae family [3].
These results indicate that both elk and moose are susceptible to infection and may be a source of transmitting the spirochete to ticks (Kathleen et al., 2003).
For amplification of the entire spirochete 16S rRNA (~1,500 bp), the spirochete-specific reverse primer C90 (Dewhirst et al.
Leptospirosis, a zoonosis with protean manifestations caused by the spirochete, Leptospira interrogans, occurs worldwide.