Anaerobic Protists
Anaerobic Protists - Related Videos
11:13
Culturing and Maintaining Clostridium difficile in an Anaerobic Environment
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Cited by 92 •
2013
Clostridium difficile is a pathogenic bacterium that is a strict anaerobe and causes antibiotic associated diarrhea (AAD). Here, methods for isolating, culturing and maintaining C. difficile vegetative cells and spores are described. These techniques necessitate an anaerobic chamber, which requires regular maintenance to ensure proper conditions for optimal C. difficile cultivation.
01:27
Diversity of Protists III
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2025
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
02:34
Preparing an Anaerobic Sludge Culture under Oxygen-Free Conditions
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2025
Source: Wagner, A. O.,et al., Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions. J. Vis. Exp. (2019)This video demonstrates the preparation and inoculation of anaerobic cultures using oxygen-free sludge under strictly controlled, deoxygenated conditions.
01:27
Anaerobic Digestion of Bioplastics for Biogas Production
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2025
Begin with an anaerobic digester, a sealed, oxygen-free reactor seeded with a synthetic sludge that mimics the settled solids from wastewater.The sludge contains mesophilic anaerobic microbes, a mixed microbial community.These microbes thrive at moderate temperatures and drive the digestion of the sludge’s organic matter.Continuously mix the sludge to sustain the bacterial activity and promote digestion.Later, add bioplastics, which are biodegradable polymers, into the sludge.During incubation,...
04:19
Visualization of Internalized Anaerobic Bacteria within Host Endothelial Cells
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2025
In this video, we demonstrate a procedure to visualize internalized Porphyromonas gingivalis, an anaerobic pathogenic bacterium, within human endothelial cells using confocal microscopy. The bacteria are stained with a fluorescent dye while the host endothelial cell actin cytoskeleton is labeled with a different fluorescent dye. The internalized Porphyromonas gingivalis inside endothelial cells are visualized using confocal microscopy.
FAQs
Energy production centers on substrate-level phosphorylation, in which ATP is generated during metabolic reactions without relying on molecular oxygen. Fermentation supplies the relevant pathway for extracting energy under these conditions. This arrangement enables growth in oxygen-limited habitats and helps explain the distinctive cellular energy biology of these eukaryotic organisms.
Hydrogenosomes are notable because some anaerobic protists use them to produce both ATP and hydrogen. Mitosomes are also mitochondria-derived organelles associated with anaerobic metabolism, but the overview does not assign them the same hydrogen-producing role. Comparing these organelles helps researchers distinguish alternative adaptations of eukaryotic cells to oxygen limitation.
The absence or limitation of molecular oxygen shapes the energy strategy of these organisms. Fermentation and substrate-level phosphorylation provide mechanisms for obtaining energy in conditions where oxygen-based growth is not available. Specialized mitochondria-derived organelles support this adaptation, allowing anaerobic protists to maintain growth in oxygen-limited environments.
Sediments and animal digestive tracts are important study environments because they can be oxygen-limited. Their contents connect cellular metabolism with surrounding microbial communities and, in host-associated settings, with symbiotic relationships or disease relevance. Comparing these habitats places anaerobic physiology within broader ecological and host-associated contexts.
Research on anaerobic protists can reveal how eukaryotic cells adapt their energy systems when oxygen is unavailable. It also provides insight into microbial communities in sediments and animal hosts, where these organisms exist within larger ecological or host-associated systems. This connects organelle function and cellular metabolism with ecosystem and host biology.
Their importance extends beyond the mechanisms of energy production. Some anaerobic protists function as symbionts, while others are important human pathogens, making them relevant to ecological biology and medicine. Studying them connects anaerobic cellular physiology with host association and with the biological consequences of living in animal-associated environments.