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microorganism : an organism (such as a bacterium or protozoan) of microscopic or ultramicroscopic size — Webster
Microorganism, or microbe, is a microscopic organism, which may be single-celled or multicellular. Microorganisms include all unicellular organisms and so are extremely diverse. Of the three domains of life identified by Carl Woese, all of the Archaea and Bacteria are microorganisms. These were previously grouped together in the two domain system as Prokaryotes, the other being the Eukaryotes. The third domain Eukaryota includes all multicellular organisms and many unicellular protists and protozoans. Some protists are related to animals and some to green plants. Many of the multicellular organisms are microscopic, namely micro-animals, some fungi and some algae, but these are not discussed here.
They live in almost every habitat from the poles to the equator, deserts, geysers, rocks and the deep sea. Some are adapted to extremes such as very hot or very cold conditions, others to high pressure and a few such as Deinococcus radiodurans to high radiation environments. Microorganisms also make up the microbiota found in and on all multicellular organisms. A December 2017 report stated that 3.45-billion-year-old Australian rocks once contained microorganisms, the earliest direct evidence of life on Earth. — Wikipedia
Microbiology is the study of microorganisms, those being unicellular (single cell), multicellular (cell colony), or acellular (lacking cells). Microbiology encompasses numerous sub-disciplines including virology, parasitology, mycology and bacteriology.
Eukaryotic microorganisms possess membrane-bound cell organelles and include fungi and protists, whereas prokaryotic organisms—all of which are microorganisms—are conventionally classified as lacking membrane-bound organelles and include eubacteria and archaebacteria. Microbiologists traditionally relied on culture, staining, and microscopy. However, less than 1% of the microorganisms present in common environments can be cultured in isolation using current means.
Microbiologists often rely on molecular biology tools such as DNA sequence based identification, for example 16s rRNA gene sequence used for bacteria identification. — Wikipedia
Microbes and More News -- ScienceDaily Current science articles on microbes and more. Read about viruses, bacteria, fungi and prions and see related videos.
Infectious diarrhea spores survive high...
on October 16, 2018 at 3:01 pm
Washing contaminated hospital bedsheets in a commercial washing machine with industrial detergent at high disinfecting temperatures failed to remove all traces of Clostridium difficile (C. difficile), a bacteria that causes infectious diarrhea, suggesting that linens could be a source of infection among patients and even other hospitals, according to a new study. […]
Dual vaccine against anthrax and plague
on October 16, 2018 at 12:13 pm
A team of researchers has now engineered a virus nanoparticle vaccine against Bacillus anthracis and Yersinia pestis, tier 1 agents that pose serious threats to national security of the United States. B. anthracis and Y. pestis are the pathogens that cause anthrax and plague, respectively. Using bacteriophage T4, the scientists developed the vaccine by incorporating key antigens of both B. anthracis and Y. pestis into one formulation. Two doses of this vaccine provided complete protection […]
How beetle larvae thrive on carrion
on October 15, 2018 at 7:06 pm
The burying beetle Nicrophorus vespilloides buries the cadavers of small animals to use them as a food source for its offspring. However, the carcass is susceptible to microbial decomposition. Researchers show that the beetles replace harmful microorganisms with their own beneficial gut symbionts, thus turning a carcass into a nursery with a microbial community that even promotes larval growth. […]
PPR virus poses threat to conservation
on October 15, 2018 at 5:29 pm
Researchers have reviewed the threat of the virus peste des petits ruminants (PPR) to conservation. […]
Virus-resistant pigs to vastly improve global...
on October 15, 2018 at 5:29 pm
Researchers have successfully produced a litter of pigs that are genetically resistant to Transmissible Gastroenteritis Virus (TGEV), which commonly infects the intestines of pigs and causes almost 100 percent mortality in young pigs. […]
Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.
Irrigating vegetables with wastewater in African...
on October 12, 2018 at 2:10 pm
Urban farmers growing vegetables to feed millions of people in Africa's ever-growing cities could unwittingly be helping to spread disease by irrigating crops with wastewater, a new study reveals. […]
Health and balance of the gut microbiota is...
on October 12, 2018 at 1:14 pm
The health and balance of the gut microbiota is important in the progression of a bacterial infection, according to new research. […]
Understanding water's role in antibiotic...
on October 10, 2018 at 4:50 pm
Greater access to antibiotic drugs, together with their misuse and overuse, has accelerated the emergence of antibiotic resistant bacteria worldwide. […]
Study discovers new delivery system that could...
on October 9, 2018 at 3:12 pm
In a recent study in the Journal of The American Chemical Society, Professor Tewodros Asefa and Associate Professor Jeffrey Boyd synthesized nanostructured silica particles, considered to be promising drug carriers, that contained payloads of an antimicrobial agent. The researchers found that the particles were effective at killing two human bacterial pathogens. […]
Expanding fungal diversity, one cell at a time
on October 8, 2018 at 3:00 pm
They can be found on forest floors, swamps and in houses, ranging in size from smaller than the period on your smartphone's keyboard to stretching over several city blocks. More than a million species of fungi are estimated to live on this planet, but most of that diversity remains unknown because the fungi have avoided detection and have not been cultured for study in laboratories. […]