Spirochete | Definition, Examples, Diseases, & Facts | Britannica
网页Spirochete, 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. Spirochetes are characteristically found in a liquid environment (e.g., mud …
Spirochaete - Wikipedia
网页Spirochaetes are chemoheterotrophicin nature, with lengths between 3 and 500 μm and diameters around 0.09 to at least 3 μm. [7] Spirochaetes are distinguished from other bacterial phyla by the location of their flagella, called endoflagella, or periplasmic flagella, which are sometimes called axial filaments.
Spirochetes: Morphology, Classification, Disease - Microbe …
网页2021年6月8日 · Spirochetes are long, thin, flexible, spirally coiled helical bacilli. These motile, gram-negative bacilli are classified into eight genera primarily on the basis of habitat, pathogenicity, phylogeny, morphological and physiological characteristics.
Lyme Disease - Lyme Disease - Merck Manual Professional Edition
网页Spirochetes are distinguished by the helical shape of the bacteria. Pathogenic spirochetes include Treponema, Leptospira, and Borrelia. Both Treponema and Leptospira are too thin to be seen using brightfield microscopy but are clearly …
Introduction to the Spirochetes - University of California Museum …
网页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. Members of this group are also unusual among bacteria for the arrangement of axial filaments, which are otherwise similar to bacterial flagella.
Spirochaete - an overview | ScienceDirect Topics
网页Spirochaetes are thin-walled spiralled flexible organisms which are motile by means of an axial filament. They are not seen in a Gram-stain (except B. vincenti), but may be seen either by dark-ground illumination microscopy, or in a silver stain under the light microscope. Borrelia spirochaetes in the blood may also be seen in a Giemsa stain.
Human intestinal spirochetosis – a review - PMC - National …
网页2010年1月7日 · Human intestinal spirochetosis (IS) is a condition defined histologically by the presence of spirochetal microorganisms attached to the apical cell membrane of the colorectal epithelium. Intestinal spirochetes comprise a heterogeneous group of bacteria. In humans, Brachyspira aalborgi and Brachyspira pilosicoli predominate. Prevalence rates of ...
Introduction to the Spirochetes | SpringerLink
网页Abstract. The order Spirochaetales consists of helically shaped bacteria with a distinguishing anatomy and locomotion. Although these bacteria are morphologically similar, their physiology and habitats are heterogeneous. The order Spirochaetales contains obligate anaerobes, facultative anaerobes, and obligate aerobes.
8.11F: Spirochaetes - Biology LibreTexts
网页2022年12月24日 · The spirochaetes are chemoheterotrophic in nature, free-living and capable of thriving in anaerobic environments. They are often distinguished from other bacterial phyla by the location of their flagella. The flagella, in spirochaetes, runs lengthwise between the inner and outer membranes in the periplasmic space.
Spirochetes | Sherris & Ryan's Medical Microbiology, 8th Edition ...
网页1 天前 · Spirochetes are bacteria with a spiral morphology ranging from loose coils to a rigid corkscrew shape. The three medically important genera include the cause of syphilis, the ancient scourge of sexual indiscretion, and Lyme disease, a more recently discovered consequence of an innocent walk in the woods.