Protozoa
Protozoa - Related Videos
17:36
Testing Protozoacidal Activity of Ligand-lytic Peptides Against Termite Gut Protozoa in vitro (Protozoa Culture) and in vivo (Microinjection into Termite Hindgut)
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Cited by 11 •
2010
We present procedures for demonstrating that ligands bind to the surface membrane of the cellulose-digesting protozoa in the gut of Formosan subterranean termites using fluorescent microscopy and that ligands coupled with lytic peptides kill these protozoa in vitro (anaerobic protozoa culture) and in vivo (injection into the termite hindgut).
09:34
Concomitant Isolation of Primary Astrocytes and Microglia for Protozoa Parasite Infection
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Cited by 5 •
2020
The overall goal of this protocol is to instruct how to extract, maintain, and dissociate murine astrocyte and microglia cells from the central nervous system, followed by infection with protozoa parasites.
11:28
Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community
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Cited by 1 •
2007
Jared Leadbetter takes us for a nature walk through the diversity of life resident in the termite hindgut - a microenvironment containing 250 different species found nowhere else on Earth. Jared reveals that the symbiosis exhibited by this system is multi-layered and involves not only a relationship between the termite and its gut inhabitants, but also involves a complex web of symbiosis among the gut microbes themselves.
15:27
Extracting DNA from the Gut Microbes of the Termite (Zootermopsis Angusticollis) and Visualizing Gut Microbes
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Cited by 18 •
2007
This video illustrates the technique for extracting DNA from the species of microbes resident in the termite hindgut. The preparation of a wet mount slide, which is useful for visualizing the gut microbial community is also illustrated, and a tour through the species-rich gut environment is given.
08:26
Nucleofection and In Vivo Propagation of Chicken Eimeria Parasites
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Cited by 9 •
2020
Here, we provided a method to achieve stable transfection of chicken Eimeria parasites by nucleofecting sporozoites or second-generation merozoites. Genetically modified eimerian parasites expressing heterologous antigenic genes could be used as vaccine delivery vehicles.
FAQs
Specialized structures allow protozoan cells to carry out essential functions within a single cell. Structures associated with movement help them change location, while feeding and waste-removal structures support resource acquisition and internal balance. Reproductive structures contribute to continuation of the organism, showing how cellular organization connects directly to survival and persistence.
Protozoa use distinct movement structures that produce different forms of locomotion. Cilia and flagella provide movement through coordinated or directional action, whereas pseudopodia are temporary extensions of the cell. These alternatives allow organisms to move through aquatic environments, soil, or other habitats in ways suited to their surroundings.
Resistant cysts provide a survival response when environmental conditions become unfavorable. By forming this resistant state, a protozoan can persist during periods that may not support ordinary activity, feeding, or movement. Cyst formation therefore links cellular behavior with environmental change and helps explain how these organisms remain present across variable habitats.
Protozoa acquire nutrients through several strategies rather than relying on one universal feeding mode. Some ingest particles, others absorb dissolved substances, and some obtain resources through symbiotic relationships with other organisms. This variety connects cellular nutrition with habitat conditions and helps explain why protozoa occupy aquatic environments, soils, and living hosts.
Studying protozoa shows how one microscopic cell can coordinate movement, feeding, waste removal, and reproduction through specialized structures. Their organization provides a useful biological context for examining how cellular components support major life functions. Because these organisms are often single-celled, relationships between structure and function can be considered without focusing on tissues or organs.
Protozoa contribute to biological processes in aquatic environments and soils, where their activities connect organisms with nutrient cycling. Their presence also makes them useful subjects for studying microbial ecology, including how microscopic life interacts with its surroundings. Examining these habitats can therefore link cellular biology to broader ecosystem processes.
Protozoan interactions with other organisms can have contrasting biological consequences. Some relationships are beneficial symbioses, while others involve parasitic infections and disease transmission. Studying both forms helps biology distinguish how organismal associations influence health and survival, while also connecting microscopic cell biology with ecological relationships and the spread of disease.