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Micrococcus is a genus of bacteria in the Micrococcaceae family. Micrococcus occurs in a wide range of environments, including water, dust, and soil. Micrococci have Gram-positive spherical cells ranging from about 0.5 to 3 micrometers in diameter and typically appear in tetrads.
In 1887, Micrococcus melitensis was isolated in Malta by David Bruce from the spleen of a soldier who had died from acute brucellosis. [6] The mechanism of transmission was not determined until 1905, when Temi Żammit found that apparently healthy goats could infect humans with M. melitensis via their milk. [7]
Brachybacterium conglomeratum is a species of Gram positive, facultatively anaerobic, whitish yellow to pale brown pigmented bacterium.The cells are coccoid during the stationary phase, and irregular rods during the exponential phase. [1]
Micrococcus spp. are obligate aerobes that inhabit human skin. Staphylococcus spp. also inhabit human skin, but they are facultative anaerobes. They ferment sugars, producing lactic acid as an end product. Many of these species produce carotenoid pigments, which color their colonies yellow or orange. Staphylococcus aureus is a major human ...
Kocuria varians is a gram-positive species of bacteria in the genus Kocuria. [4] [5] It has been isolated from milk, [2] [6] meat, [7] skin, soil, [8] and beach sand. [9]It is 0.9 to 1.5 micrometers in diameter, and occurs in clusters, which can be up to 4 millimeters in diameter [8] and are yellow. [9]
Mycobacteria Growth Indicator Tube (MGIT) samples in ultraviolet light. Emission of orange fluorescence indicates the presence of mycobacteria. The samples without fluorescence in this image still reflect some light from the others. Mycobacteria Growth Indicator Tube (MGIT) is intended for the culture, detection and recovery of mycobacteria.
An MSA plate with Micrococcus sp. (1), Staphylococcus epidermidis (2) and S. aureus colonies (3). Mannitol salt agar or MSA is a commonly used selective and differential growth medium in microbiology. It encourages the growth of a group of certain bacteria while inhibiting the growth of others. [1]
Micrococcus luteus is a Gram-positive to Gram-variable, nonmotile, tetrad-arranging, pigmented, saprotrophic coccus bacterium in the family Micrococcaceae. [1] It is urease and catalase positive. An obligate aerobe , M. luteus is found in soil, dust, water and air, and as part of the normal microbiota of the mammalian skin.