Who discovered Micrococcus luteus?

Sir Alexander Fleming
luteus is found in soil, dust, water and air, and as part of the normal flora of the mammalian skin. The bacterium also colonizes the human mouth, mucosae, oropharynx and upper respiratory tract. It was discovered by Sir Alexander Fleming before he discovered Penicillin in 1928.

How is Micrococcus luteus diagnosed?

It can commonly be mis-identified by eye as Staphylococcus aureus due to the golden / yellow colour so identification beyond colony morphology is required. Other distinguishing identification features are that M. luteus is urease & catalase but coagulase negative.

How do you identify a Micrococcus?

DIAGNOSIS. Micrococci are catalase-positive, oxidase-positive, strictly aerobic Gram-positive cocci that grow in clusters. On sheep blood agar they form cream-colored to yellow colonies. Resistance to mupirocin and staphylolysin, and susceptibility to bacitracin and lysozyme differentiate them from the staphylococci.

Where is Micrococcus found?

Micrococcus strains commonly are found in a large variety of terrestrial and aquatic ecosystems, including soil, fresh and marine water, sand, and vegetation. The skin of warm-blooded animals, including humans, is a main reservoir for Micrococcus strains, which frequently contaminate foods of animal origin.

What is the taxonomy of Micrococcaceae?

The family Micrococcaceae includes bacterial genera of Gram positive cocci that inhabit the air and skin, such as Micrococcus luteus . The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature and the phylogeny is based on whole-genome sequences.

Are Micrococcaceae found in raw milk?

Micrococcaceae are always present in raw milk samples, although their levels do not exceed usually 1% of the total bacterial population. Some species are pathogenic, such as S. aureus and S. haemolyticus, responsible for mastitis.

Is Micrococcaceae Gram positive or negative?

The family Micrococcaceae includes bacterial genera of Gram positive cocci that inhabit the air and skin, such as Micrococcus luteus.

What is the difference between Staphylococcus and Micrococcaceae?

The family Micrococcaceae also includes Micrococcus species and Stomatococcus mucilaginosus. Like staphylococci, these organisms are nonmotile and nonspore-forming; in addition, they are gram-positive cocci that grow as irregular clusters. The features that distinguish staphylococci, micrococci, and stomatococci are summarized in Table 116-1.