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Related Concept Videos

Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

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The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Bacterial Phylum Spirochaetes01:30

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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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Bacterial Phylum Tenericutes01:24

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The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...
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Bacterial Phylum Cyanobacteria01:30

Bacterial Phylum Cyanobacteria

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Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...
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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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Forward Genetic Approaches in Chlamydia trachomatis
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Chlamydiae in the Environment.

Astrid Collingro1, Stephan Köstlbacher1, Matthias Horn1

  • 1Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria.

Trends in Microbiology
|June 28, 2020
PubMed
Summary
This summary is machine-generated.

Chlamydiae are ancient bacteria found widely in the environment, not just as human pathogens. Studying environmental chlamydiae reveals insights into their biology, evolution, and ancient origins.

Keywords:
Chlamydia trachomatisChlamydialesamoebamicrobe–host interactionprotistssymbionts

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Bacteriology

Background:

  • Chlamydiae are recognized as significant human pathogens.
  • These bacteria are also prevalent in diverse environmental niches, including protists and animals.
  • Their ecological roles and evolutionary history are not fully understood.

Purpose of the Study:

  • To review recent advancements in understanding the diversity and distribution of environmental chlamydiae.
  • To explore how studying environmental chlamydiae can inform our understanding of chlamydial biology and evolution.
  • To highlight the evolutionary significance of chlamydiae as ancient bacteria.

Main Methods:

  • Literature review of recent studies on environmental chlamydiae.
  • Synthesis of data on chlamydial diversity across various ecosystems.
  • Analysis of evolutionary implications based on current research.

Main Results:

  • Chlamydiae exhibit remarkable ubiquity and diversity in environmental settings.
  • Environmental chlamydiae offer unique models for studying fundamental bacterial processes.
  • Evidence suggests chlamydiae are among the most ancient and successful obligate intracellular bacteria.

Conclusions:

  • Environmental chlamydiae are crucial for a comprehensive understanding of the phylum.
  • Their study provides novel perspectives on chlamydial evolution and biology.
  • Chlamydiae represent an ancient and highly successful bacterial lineage.