Non-random fragmentation of ribosomal RNA in Helicobacter pylori during conversion to the coccoid form
نویسندگان
چکیده
منابع مشابه
Is the coccoid form of Helicobacter pylori viable?
Helicobacter pylori was grown on solid medium for up to 5 weeks. Morphological conversion from spiral to coccoid forms began after 7 days incubation under microaerophilic conditions. Similar to the exponential cultures, the ageing bacteria produced alkaline phosphatase, acid phosphatase, leucine arylamidase and naphthol-AS-beta 1-phosphohydrolase, although there was a reduction in the levels of...
متن کاملMethods for Detecting the Environmental Coccoid Form of Helicobacter pylori
Helicobacter pylori is recognized as the most common pathogen to cause gastritis, peptic and duodenal ulcers, and gastric cancer. The organisms are found in two forms: (1) spiral-shaped bacillus and (2) coccoid. H. pylori coccoid form, generally found in the environment, is the transformed form of the normal spiral-shaped bacillus after exposed to water or adverse environmental conditions such ...
متن کاملStreptococcus mitis Induces Conversion of Helicobacter pylori to Coccoid Cells during Co-Culture In Vitro
Helicobacter pylori (H. pylori) is a major gastric pathogen that has been associated with humans for more than 60,000 years. H. pylori causes different gastric diseases including dyspepsia, ulcers and gastric cancers. Disease development depends on several factors including the infecting H. pylori strain, environmental and host factors. Another factor that might influence H. pylori colonization...
متن کاملChanges in the Evolution of the Antigenic Profiles and Morphology during Coccoid Conversion of Helicobacter pylori
OBJECTIVES The significance of the coccoid forms of H. pylori is still controversial and the questions of whether these forms are viable and infective or degenerative are still open. We induced conversion from rod to coccoid forms and studied morphological changes and antigenic evolutions during this conversion and, thereby, elucidated the viability of coccoid forms. METHODS The H. pylori str...
متن کاملCoccoid forms of Helicobacter pylori.
To the Editor-Eaton et al. [1] recently described experiments with coccoid Helicobacter pylori in gnotobiotic piglets. This interesting study examined the colonization and the reversion from coccoid to bacillary H pylori within 2 weeks of inoculation. Piglets colonized with bacillary H pylori had more severe gastritis 2 weeks after inoculation than did those sacrificed 1 week after inoculation....
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ژورنال
عنوان ژورنال: FEMS Immunology and Medical Microbiology
سال: 1998
ISSN: 0928-8244
DOI: 10.1016/s0928-8244(98)00092-3