Staphylococcus is a genus of Gram-positive bacteria in the family Staphylococcaceae from the order Bacillales. Under the microscope, they appear spherical (cocci), and form in grape -like clusters. Staphylococcus species are facultative anaerobic organisms (capable of growth both aerobically and anaerobically).

At least 30 species of staphylococci have been recognized by biochemical analysis and in particular by DNA-DNA hybridization. Eleven of these can be isolated from humans as commensals. S aureus (nares) and S epidermidis (nares, skin) are common commensals and also have the greatest pathogenic potential.

2024年12月28日 · Staphylococcus is a group of spherical bacteria, the best-known species of which are universally present in great numbers on the mucous membranes and skin of humans and other warm-blooded animals.

Become familiar with the speciation of the genus Staphylococcus. Grow and identify different staphylococci species using selective and differential agar; Identify the 3 hemolytic types on blood agar.

Staphylococcus bacteria, identified as the cause of various pyogenic infections in man in 1880 (by Sir Alexander Ogston), are Gram-positive characterized by irregular clusters. They are widely distributed in nature and can be found on the skin and mucous membranes (nasopharynx and gastrointestinal tract) of various animals and birds.

2024年7月13日 · Coagulase-negative staphylococci (CoNS) are aerobic, Gram-positive coccus occurring in clusters [Fig]. Predominantly found on the skin and mucous membranes. Catalase positive but coagulase negative (S. aureus is coagulase positive). S. epidermidis: colonies typically small, white-beige (about 1-2 mm in diameter).

Staphylococcus is a genus of Gram-positive bacteria known for their spherical or grape-like clustered shape under a microscope. They are commonly found in various environments, including on the skin and mucous membranes of humans and animals.