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Bacterial Phylum Bacteroidota01:26

Bacterial Phylum Bacteroidota

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The phylum Bacteroidota includes over 700 species classified into four primary orders: Bacteroidales, Cytophagales, Flavobacteriales, and Sphingobacteriales. These gram-negative, non-sporulating rods exhibit saccharolytic capabilities and can be aerobic or fermentative, encompassing obligate aerobes, facultative aerobes, and obligate anaerobes. Many species display gliding motility, though some are nonmotile or use flagella. The genus Bacteroides is well-studied due to its significant role in...
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Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
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Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Atomic Force Microscopy Combined with Infrared Spectroscopy as a Tool to Probe Single Bacterium Chemistry
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Line-associated bacteraemias

T S Elliott1

  • 1Department of Clinical Microbiology, Queen Elizabeth Hospital, Edgbaston, Birmingham.

Communicable Disease Report. CDR Review
|June 18, 1993
PubMed
Summary
This summary is machine-generated.

Catheter-associated sepsis is a major health concern, causing significant illness and death. Strict aseptic techniques are crucial for preventing these bloodstream infections, more so than antimicrobial polymers or electrical charge.

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Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Sepsis linked to intravascular catheters presents a substantial challenge, contributing significantly to patient morbidity and mortality in England and Wales.
  • In 1991, approximately 4000 cases of line-associated bacteraemia were reported to the PHLS Communicable Disease Surveillance Centre, highlighting the prevalence of this issue.

Purpose of the Study:

  • To review the diagnostic criteria for catheter-related infections.
  • To explore various strategies for preventing catheter-related sepsis.

Main Methods:

  • Review of clinical and laboratory diagnostic criteria for catheter-related infections.
  • Description of preventive measures, including antimicrobial polymers and electrical charge applications.

Main Results:

  • The study reviews diagnostic criteria and preventive approaches for catheter-related sepsis.
  • While novel methods like antimicrobial polymers and electrical charge are discussed, the primary finding emphasizes the continued importance of established practices.

Conclusions:

  • Strict adherence to aseptic techniques remains the most effective method for reducing the incidence of catheter-related sepsis.
  • The findings underscore the critical role of fundamental infection control practices in managing intravascular catheter-associated infections.