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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.
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.
Colonies of Micrococcus luteus on Tryptic Soy Agar. Cultivation 48 hours, 37°C. Trypticase soy agar or Tryptic soy agar (TSA) is a growth media for the culturing of moderately to non fastidious bacteria. It is a general-purpose, non-selective media providing enough nutrients to allow for a wide variety of microorganisms to grow.
Blood is normally sterile. [1] The presence of bacteria in the blood is termed bacteremia, and the presence of fungi is called fungemia. [2] Minor damage to the skin [3] or mucous membranes, which can occur in situations like toothbrushing or defecation, [4] [5] can introduce bacteria into the bloodstream, but this bacteremia is normally transient and is rarely detected in cultures because the ...
Colonial morphology serves as the first step in the identification of microbial species from clinical samples. [10] Based on the visual appearance of the colonies, microbiologists can narrow down the list of possible organisms, allowing them to select appropriate tests to provide a definitive diagnosis.
Micrococcus Cohn 1872 (Approved Lists 1980) Neomicrococcus Prakash et al. 2015; Nesterenkonia Stackebrandt et al. 1995; Paenarthrobacter Busse 2016; Paeniglutamicibacter Busse 2016; Pseudarthrobacter Busse 2016; Pseudoglutamicibacter Busse 2016; Psychromicrobium Schumann et al. 2017; Renibacterium Sanders and Fryer 1980; Rothia Georg and Brown ...
Micrococcus luteus: Skin Micrococcus spp Skin Mycobacterium spp Skin Neisseria spp Skin Peptostreptococcus spp Skin Propionibacterium spp Skin Pseudomonas aeruginosa: Skin Mostly Sarcina spp Skin Staphylococcus aureus: Skin Staphylococcus epidermidis: Skin Sometimes, mostly not Staphylococcus haemolyticus: Skin Streptococcus viridans: Skin ...
Streptolysin O is an oxygen-sensitive cytotoxin secreted by most Group A streptococcus (GAS) and Streptococcus dysgalactiae; it interacts with cholesterol in the membrane of eukaryotic cells (mainly red and white blood cells, macrophages, and platelets), usually resulting in β-hemolysis under the surface of blood agar. Streptolysin S is an ...