M. luteus has a G-C content of about 65-75 mol%. The negative oxidase result conflicts with M. luteus (Public Health England). Intro: Microbes are everywhere, even in the most extreme environments and conditions. Download Scientific Diagram from www.researchgate.net. . Some streptococci also possess unique cell wall carbohydrate antigens that can be identified by reactivity with specific indicator antibodies in an agglutination assay (Lancefield typing). They are seldom motile and are non-sporing. The colony morphology is the same as well, being round, shiny, and sort of flat (Medical Laboratories). 2002). Required fields are marked *. Staphylococci were distinguished by their ability to form acid from glucose anaerobically and sarcinas by the formation of cubical packets. Micrococcus luteus are Gram-positive, to Gram-variable, motile -non motile, that are 0.5 to 3.5 micrometers in diameter and usually arranged in tetrads or irregular clusters. Although of low virulence, the germs may become more pathogenic in patients with impaired resistance, colonizing the surface of heart valves. Beta-hemolysis is a defining characteristic of Staphylococcus aureus and a certain streptococci. The confidence on that reading is decently confident, evidenced by the blue coloring. Micrococcus Public Health Agency of Canada., Public Health England. We were aiming to isolate a bacterium from this initial environmental sample by using repeated quadrant streaks to isolate single species colonies, therefore producing a pure culture that we could do a multitude of tests on which include Gram staining, genetic analysis and antibiotic testing along with many other tests. The modified oxidase reagent is prepared as tetramethyl-p-phenylenediamine in certified grade dimethyl sulfoxide. Gram-positive organisms appear purple under the microscope as opposed to the other category of bacterial cell with its own unique cell wall, the Gram-negative rod or coccus, which stains red. This bacterium can withstand massive doses of UV radiation and it also has the capability to degrade certain pollutants such as petrol. Micrococci can grow well in environments with little water or high salt concentrations, including sportswear that is made with synthetic fabrics. Micrococcus A study with 188 micrococci, identified only to the genus level, demonstrated MICs at achievable concentrations for most -lactams, aminoglycosides, glycopeptides, clindamycin and the most active drug in vitro, rifampin.