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INFO: Full form for DVO is District Veterinary Office in Medical category
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INFO: Full form for eat is Ectopic Atrial Tachycardia in Medical category
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INFO: Full form for EAT is Equine Assisted Therapy in Medical category
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INFO: Full form for EAT is Ehrlich Ascites Tumor in Medical category
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INFO: Full form for EAT is Equivalent Average Transmission in Medical category
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INFO: Full form for DNM is Doctor of Natural Medicine in Medical category
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INFO: Full form for BAT is Blunt Abdominal Trauma in Medical category
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INFO: Full form for BAT is B-mode Acquisition and Targeting in Medical category
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INFO: Full form for BAT is Brain Attack Team in Medical category
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INFO: Full form for BAT is Bright Acuity Test in Medical category
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INFO: Full form for BAT is Behavioural Avoidance Test in Medical category
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INFO: Full form for BAT is Bivalirudin Angioplasty Trial in Medical category
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Bacteria ( (listen); common noun bacteria, singular bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria are vital in many stages of the nutrient cycle by recycling nutrients such as the fixation of nitrogen from the atmosphere. The nutrient cycle includes the decomposition of dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. Bacteria also live in symbiotic and parasitic relationships with plants and animals. Most bacteria have not been characterised and there are many species that cannot be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.

Humans and most animals carry millions of bacteria. Most are in the gut, and there are many on the skin. Most of the bacteria in and on the body are harmless or rendered so by the protective effects of the immune system, though many are beneficial, particularly the ones in the gut. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, and bubonic plague. The most common fatal bacterial diseases are respiratory infections. Antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. Bacteria are important in sewage treatment and the breakdown of oil spills, the production of cheese and yogurt through fermentation, the recovery of gold, palladium, copper and other metals in the mining sector, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.

Once regarded as plants constituting the class Schizomycetes ("fission fungi"), bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.

INFO: Full form for BAT is Brown Adipose Tissue in Medical category
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INFO: Full form for BAT is Blitz Action Trauma in Medical category
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INFO: Full form for BAT is Bulimic Anorexic Trauma in Medical category
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INFO: Full form for BAT is Brightness Acuity Test in Medical category
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