Try this link for info on M. luteus. http://www.sunysccc.edu/academic/mst/microbes/09mlute.htm
Basically this is an absolutely harmless bacterium that lives on the skin. It's really a beautiful yellow color when you grow it on agar plates. It tends to grow in clumps of 4-8 cells.
2006-10-03 12:08:16
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answer #1
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answered by hcbiochem 7
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Micrococcus Luteus Arrangement
2016-11-16 03:22:34
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answer #2
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answered by ? 4
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Micrococcus Luteus Shape
2017-01-02 08:44:42
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answer #3
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answered by ? 3
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You must have the same project as I do, is your teacher Terri Green? Lol. It was also really hard for me to find a lot of that info. Here is what I have found so far: It is Gram positive and does not form endospores. It's shape is coccus and its optimal growing conditions are 35ºC on blood agar with oxygen available. This organism is commonly found on mammalian skin, and sometimes found on meat, dairy products, soil, and in water. It has also been associated with spoiled fish. M. roseus doesn't cause diseases, but it can cause skin infections in humans with compromised immune systems, like with HIV+ patients. The skin infections, or chronic cutaneous infections, result in priuritic eruptions of the skin in some areas as well as scattered papule lesions with or without central ulcerations. Micrococci can be catabolically versatile, with the ability to utilize a wide range of unusual substrates, such as pyridine, herbicides, chlorinated biphenyls, and oil. They are likely involved in detoxification or biodegradation of many other environmental pollutants. Other Micrococcus isolates produce various useful products, such as lubricating oils. On solid media, M. roseus has small, round, smooth, and red colony growth. In the broth media, it formed a white cloudy film at the bottom of the test tube. Finally, on the slant media, it formed a white, cottony growth along the slant. I did not find anything about the reaction from selective media. M. roseus can cause the hydrolysis of starch and catalase is found in it. I did not find anything about the effects of the differential media for Gram +/- and caseinase on growth. The results from the Durham tubes has not yet been observed. Hope this helps, it was my report on Micrococcus roseus.
2016-04-10 22:26:03
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answer #4
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answered by Anonymous
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This Site Might Help You.
RE:
Can you please give me info about micrococcus luteus?
I want some thing about some interesting things about this bacteria. Can you find some info about asptic tank? Can ou find some things about specific bacteria? Can you tell me what does this bacteria do? What does this bacteria live. Can you tell me some information about sutuctures. What does this...
2015-08-05 22:54:29
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answer #5
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answered by Anonymous
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Classification:
Higher order taxa:
Bacteria; Actinobacteria; Actinobacteria (class); Actinobacteridae; Actinomycetales; Micrococcineae; Micrococcaceae
Species:
Micrococcus antarcticus; M. luteus; M. lylae; M. roseus; M. sp.
Description and Significance:
M. luteus can be found in many places such as the human skin, water, dust, and soil. Micrococcus is generally thought of as harmless bacterium, but there have been rare cases of Micrococcus infections in people with compromised immune systems, as occurs with HIV patients.
Genome Structure:
Hybridization studies show no close genetic relationship among the species of Micrococcus. For example, M. luteus and M. lylae are 40-50% genetically different. M. luteus has a G-C content of 65-75 mol%. About half of the strains of M. luteus were found to carry plasmids 1 to 100MDa in size. So far two genome sequences have been done, one on Micrococcus sp. 28 plasmid pSD10 and another on Micrococcus luteus plasmid pMLU1.
Cell Structure and Metabolism:
Micrococcus are Gram-positive cocci that are 0.5 to 3.5 micrometers in diameter and usually arranged in tetrads or irregular clusters. They are generally strict aerobes and can generally reduce nitrate. M. luteus oxidizes carbohydrates to CO2 and water, and it does not produce acid from glucose as well as it does not make arginine dihydrolase or b-galactosidase. Some Micrococcus are pigmented bacteria; for example, M. luteus produces yellow colonies and M. roseus produces redish colonies. Micrococcus species are oxidase-positive, which can be used to distinguish them from other bacteria like most Staphylococcus species, which are generally oxidase-negative. Defining characteristics of Micrococcus are the ability to aerobically produce acid from glucose glycerol, aesculin hydrolysis, arginine dihydrolase, major pigment production, motility, and conversion of nitrate to nitrite (Smith et al. 1999).
Ecology:
M. luteus has been isolated from human skin, animal and dairy products, and beer. It can be found in many other places in the environment, as well, like water, dust, and soil. M. luteus on human skin breaks down compounds in sweat into compounds with bad odor. M. luteus can grow well in environments with little water or high salt concentrations. They grow optimally at 37oC and can be easily grown on inorganic nitrogen agar or Simmon's citrate agar. Although some, like Micrococcus antarcticus, are cold-adapted, and have been found living in Antarctica and in marine environments.
Pathology:
Although Micrococcus rarely causes infections or problems in the body, those with compromised immune systems, such as occurs with HIV+ patients, have been known to get skin infections caused by Micrococcus luteus. The skin infections, or chronic cutaneous infections, result in pruritic eruptions of the skin in some areas as well as scattered papule lesions with or without central ulcerations. Micrococcus as the cause of infections is easy to overlook because infections caused by this bacterium are rare as well as the bacterium is a natural part of the skin's bacterial flora. Thus, when dealing with Micrococcus infections, it usually takes several cultures being grown and examined (at about 35oC on blood agar) before one realizes that Micrococcus is indeed the culprit. Most Micrococcus infections are discovered through process of elimination (all other bacterial, fungal, etc. tests showing up negative) along with the presence of abundant Micrococcus tetrads in the lesions or cysts (which would normally have been overlooked because Micrococcus is a natural part of the skin's microbial flora) (Smith, et al. 1999). Though today immunocompromised patients the risk of infection has grown. There have been several deaths in immunocompromised children (caused by leukemia) from pulmonary hemorrhages because of Micrococcus. Recently, this organism was recognized as an opportunistic pathogen and has been implicated in recurrent bacteremia, septic shock, septic arthritis, endocarditis, meningitis, intracranial suppuration, and cavitating pneumonia in immunosuppressed patients.
2006-10-03 20:19:26
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answer #6
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answered by SP!DEY ! 2
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